Wrap: This afternoon ...
Defence counsel Michael Byrne QC continued his closing address to the jury, focusing on three key points.
Mr Byrne said the scratches which appeared on Mr Baden-Clay's on the morning he reported his wife missing could not be relied upon to convict his client of murder. Mr Baden-Clay has dismissed the injuries as shaving cuts, although four forensic experts have told the court the abrasions are more consistent with fingernail scratches. Mr Byrne said expert forensic witnesses could not rule out that the injuries were caused by a razor.
"You will not be satisfied that razor scrapes cannot be excluded and that would be the end of your consideration of that piece of evidence," he said.
Mr Byrne pointed to evidence from forensic psychiatrist Dr Mark Schramm who reviewed Mrs Baden-Clay's medical records. Dr Schramm said Mrs Baden-Clay may have been on the verge of a relapsing into depression after the revelation of her husband's infidelity.
Mr Byrne said Mrs Baden-Clay may also have been disillusioned by the birth of her nephew in Canada because she had wanted to bear a son to continue the Baden-Clay name.
The alternate scenario
Mr Byrne also painted an alternate scenario for the jury, one in which Mrs Baden-Clay went for walk in the very early hours of April 20, 2012, to "clear her head", but became disorientated and kept on walking.
"And at some time and for some reason she ends up in the river," he said.
A photograph of Gerard Baden-Clay's razor. Photo: Court Exhibit
Court has adjourned for the day.
Mr Byrne will continue his closing address to the jury from 10am tomorrow.
Mr Byrne said Mrs Baden-Clay may have left her house in the early hours of April 20, 2012, in a distressed state.
"What if she decided to go for a walk at that time to clear her head? What if, because of her depression she takes a Zoloft tablet about 10 or 11pm? That might explain her changing into her walking clothes, which she's found in," Mr Byrne said.
"She leaves the house after placing Gerard's phone on the charger about 1.48am. She walks her usual walk along Boscombe Road and then decides to walk a bit further ... she keeps walking.
"Around 4am the drugs would peak in her blood stream, the medication absorbed in the stomach."
Mr Byrne said Mrs Baden-Clay could have been adversely affected by the increased level of the antidepressant Sertraline in her system that could have cause her to hallucinate.
"And at some time and for some reason she ends up in the river," he said.
"The autopsy can't rule out drowning, it can't rule out a possible fall, or jump from the bridge ...
"That's just a scenario, you may reject it, but it's something you might think is open on the evidence ..
"This trial is a murder trial. It's about you being satisfied beyond reasonable doubt that this man here, for no apparent reason, with no apparent means, managed to kill his wife and dispose of her body."
Boscombe Road. Photo: Google Earth
"Let's look to see if there was any other factor, any other stressor, a trigger for a recurrence or relapsing in the depressive illness. In particular, let's talk about this one ..." Mr Byrne said.
"Allison so wanted a son after having two girls."
She gave birth to her third daughter in 2006.
Mr Byrne urged to the jury to factor in, "as far as a trigger is concerned", the birth of Mr Baden-Clay's nephew in Canada on the evening of April 18, 2012.
Mr Byrne said there were "symptoms of the past recurring" with regard to Mrs Baden-Clay's depression on the night she disappeared.
"There was a high chance at that time that she was relapsing into her depressive illness," he said.
"That's the picture of where Allison was, at least psychologically."
Mr Byrne has turned his attention to Mrs Baden-Clay's history with depression and anxiety.
He recalled the evidence of forensic psychiatrist Dr Mark Schramm.
"One could imagine that the stress association wit the problems in the marriage could have contributed to thoughts of suicide. One could imagine that even though she'd learnt about that, I understand, some time beforehand, that those wounds may have become more raw upon visiting the Relationships Australia counsellor. So I don't I can confidently say there's nothing in the notes that I've seen to suggest that she might be a risk," Dr Schramm said.
The Baden-Clays had seen Relationships Australia counsellor Carmel Ritchie on April 16, 2012, to discuss Mr Baden-Clay's infidelity.
This counsellor did not know that Allison had a lengthy history of depression #badenclay— Caroline Overington (@overingtonc) July 7, 2014
Mr Byrne has displayed another PowerPoint slide to the court which reads;
1. The deceased could have drowned; or
2. The deceased could have fallen from a height to her death or to cause drowning; or
3. The deceased could have died from alcohol and/or Sertraline toxicity; or
4. The deceased could have suffered the effects of Serotonin Syndrome which led to her drowning or falling from a height to her death.
The court has heard Mrs Baden-Clay was first prescribed the antidepressant Sertraline, sold as Zoloft, while 26 weeks pregnant with her second child.
The court has also heard high levels of Sertraline can cause Serotonin Syndrome which can prompt hallucinations and unusual behaviours.
"To recap, you will not be satisfied that razor scrapes cannot be excluded and that would be the end of your consideration of that piece of evidence," Mr Byrne said.
Mr Byrne has encouraged the jury to consider the "shaving cuts" carefully.
"This is so important. This is a murder trial. A person is on trial [for] his life for murder," he said.
Defence says another witness testified #badenclay facial marks consistent w f'nail scratches. 'We don't shirk from that'. @7NewsBrisbane — Katrina Blowers (@katrinablowers) July 7, 2014
Mr Baden-Clay's sister Olivia Walton and brother Adam Baden-Clay are seated in the front row of the public gallery behind the dock.
Mr Baden-Clay is seated in the dock, wearing a dark suit and a blue and white striped tie, with his hands neatly folded in his lap.
Police photograph of marks on Gerard Baden-Clay's face. Photo: Court Exhibit
Mr Byrne has turned his attention to the injuries which appeared on Mr Baden-Clay's face on the morning he reported his wife missing.
"[He] never made any attempt to conceal the marks on his face," Mr Byrne said.
"He was the one who called police to his home on the morning of the 20th of April. His face was there for all to see. There was no attempt to conceal it."
Mr Baden-Clay dismissed the two abrasions on his right cheek as shaving cuts. But four forensic experts, who testified at the trial, said the abrasions were more consistent with fingernail scratches.
Mr Byrne said Mr Baden-Clay explained the two shaving cuts in an "open and candid fashion". He said Mr Baden-Clay's explanation remained consistent throughout the police investigation into his wife's disappearance and the trial.
"What is abundantly clear is that clearly Gerard Baden-Clay was not concerned about those marks. He never gave an alternate explanation," he said.
The court has again been shown a time-lapse video depicting the rising and falling tide in Kholo Creek.
The video shows large debris being washed against the banks.
The defence has suggested Mrs Baden-Clay's was washed up on the muddy bank after she took her own life at the Kholo Creek bridge.
Kholo Creek. Photo: Court Exhibit
"Both Gerard and Allison both had insurance policies," Mr Byrne said.
"Nothing of those policies are inappropriate ... for the parents of three young girls."
Mr Baden-Clay contacted his wife's insurance company the day after her body was discovered on April 30, 2012. The real estate agent said he contacted the insurer on the advice of his father Nigel Baden-Clay.
Gerard Baden-Clay's lawyer Peter Shields (left) arrives at court with Gerard Baden-Clay's parents Nigel and Elaine. Photo: Renee Melides
Court has resumed.
Defence counsel Michael Byrne QC has turned his attention again to Mr Baden-Clay's financial situation in early 2012.
Wrap: So far today ...
Mr Baden-Clay's defence barrister Michael Byrne QC has begun his closing address to the jury.
He has sought to discredit the prosecution's key allegations that love and money were motives for the killing of Allison Baden-Clay.
Mr Byrne said Mr Baden-Clay had no intention of leaving his wife for his long-time mistress Toni McHugh and was not under "significant financial stress" at the time of his wife's disappearance two years ago.
He has also pointed to the lack of evidence linking Mr Baden-Clay to the crime scene at Kholo Creek and warned the jury not to make excuses for the absence of forensic evidence "because Allison is dead and someone must be punished".
Mr Byrne has also urged the jury not to be swayed by "sensationalist media reports" and consider only the facts presented in court, saying the murder trial is not a "soap opera" or "whodunit play".
Follow our full coverage of the trial here.
The court has adjourned for lunch and will resume at 2pm for legal argument.
The jury will be required to return at 2.30pm.
Mr Byrne said the three friends - Robert Cheesman, Stuart Christ and Peter Cranna - who had each loaned Mr Baden-Clay $90,000 were not concerned about the real estate agent's financial position in early 2012.
The defence says three friends who looked at the books weren't particularly worried about Gerard's position #badenclay— Caroline Overington (@overingtonc) July 7, 2014
Mr Byrne said money as a motive for the murder of your wife of 14 (nearly 15) years was "ridiculous".
"Gee, I've got [financial] difficulties. I might kill my wife," Mr Byrne said.
Mr Byrne has displayed to the court a balance sheet documenting Mr Baden-Clay's asset
The spreadsheet shows Mr Baden-Clay had a "net asset position" of $74,663.11.
"What that tells us is that Gerard Baden-Clay had significant financial assets at the time of April 2012," Mr Byrne said.
Gerard Baden-Clay. Photo: Supplied
Mr Byrne has returned to the PowerPoint slide.
"Why would Gerard Baden-Clay kill his wife?" he said.
Mr Byrne said Mr Baden-Clay was not under significant financial stress as the prosecution would have the jury believe.
Mr Byrne said Mr Baden-Clay was not one to "rise to great passion and explode" in a temper.
He said his client remained calm even as he was cross-examined and repeated accused of killing his wife by seasoned Crown prosecutor Todd Fuller QC.
Mr Byrne said Ms McHugh was "wallpaper" and "artefact" and therefore not a motive for murder.
"It's cruel ... but that's what the evidence paints," Mr Byrne said.
The court has heard Mr Baden-Clay promised to be with Ms McHugh "unconditionally" from July 1, 2012.
But Mr Byrne said Mr Baden-Clay had no intention of leaving his wife for Ms McHugh.
He said Ms McHugh did not believe the July 1 date to be set in stone.
"[She said] 'I thought he's pulling a number out of thin air. In actual fact, I just didn't believe it. I didn't believe it at all'," Mr Byrne said.
Ms McHugh testified on the fifth day of the trial.
Gerard Baden-Clay and Toni McHugh's emails are submitted to the Brisbane Supreme Court where the father-of-three is standing trial for his wife Allison's murder. Photo: Court Exhibit
The court has previously heard Mr Baden-Clay had multiple affairs with different women throughout his marriage.
He was still embroiled in an affair with his long-time mistress Ms McHugh at the time of his wife's disappearance.
"Whatever you think of Gerard's morals, you don't use those morals to convict him of this crime," Mr Byrne said.
Mr Byrne has displayed another PowerPoint slide to the court which is titled: "Why would Gerard Baden-Clay kill his wife?"
The slide includes two key questions:
* To be with Toni McHugh?
* Because of financial pressure?
The prosecution has alleged Mr Baden-Clay was embroiled in an illicit affair with his former employee Toni McHugh and was under significant financial stress at the time of his wife's disappearance.
Allison Baden-Clay, her husband Gerard Baden-Clay and his ex-mistress Toni McHugh.
Allison Baden-Clay. Photo: Supplied
"This is a circumstantial case, alleging murder," Mr Byrne said.
"I ask you to embrace the evidence, it's not media headlines, it's not sensationalism."
Mr Byrne pointed to the lack of forensic evidence in the house, the car and the car port as sufficient reasonable doubt.
"It's the absence of those things which loom large in this," he said.
Mr Byrne said the jury should not attempt to make excuses for the "lack of a link" between the Baden-Clays' house and their Holden Captiva and Kholo Creek bridge simply because "Allison is dead and someone must be punished".
Court has resumed after the morning tea break.
Mr Byrne has again highlighted the lack of mud or grass in the Holden Captiva which Mr Baden-Clay drove after allegedly dumping his wife's body at Kholo Creek.
He has read aloud the questions on the PowerPoint slide.
The court has adjourned until 12.05pm when Mr Byrne will continue is closing address.
Mr Byrne said Mr Baden-Clay would have had to walk through long grass and mud, down a steep embankment, to dump his wife's body on the banks of Kholo Creek.
No traces of mud or grass were found in the Holden Captiva after it was seized by police on April 20, 2012.
"Ask yourselves the critical question ... do you think such a scenario is even possible?" Mr Byrne said.
The PowerPoint slide includes a series of questions and statements:
* How do you carry a deceased body down the steep embankment, at night, when police officers had trouble traversing the same area during daylight?
* How do you carry a deceased body over a muddy area without tracking mud back to the Captiva?
* If the deceased was dragged then there would be injuries on the body consistent with that.
* If the deceased was dragged then there would be evdience of that at the house or at Kholo Creek.
* How do you do what you are alleged to have done without leaving a crime scene indicative of being at Kholo Creek?
* A child waking up and discovering that their parents are not in the house for the period of time, at least 40 minutes that they must have been gone.
Allison Baden-Clay's body was discovered under the Kholo Creek bridge. Photo: Court Exhibit
Police examine Allison Baden-Clay's car. Photo: Court Exhibit
Mr Byrne has displayed another PowerPoint slide to the courtroom.
The slide is headed: "How did Gerard Baden-Clay dispose of the body?"
The prosecution has alleged Mr Baden-Clay dragged his dead wife to the boot of her Holden Captiva parked in the family's car port and then drove to Kholo Creek at Anstead where he dumped her body on the muddy banks.
"Why is there no blood anywhere in the house, outside the house, on the patio, in the carport, when the prosecution case is the body is somehow either dragged or carried through the foliage and deposited in the car?" Mr Byrne asked.
"But there's one [blood stain] in the car and therefore that's how he did it.
"All you have in the car is a blood stain ... that can't be aged."
Mr Byrne has now turned his attention to the Baden-Clays' daughters.
The girls were asleep in their beds when their father allegedly murdered their mother.
"There are three girls asleep in that house," Mr Byrne said.
"Three girls are in the house in the 19th of April."
Allison and Gerard Baden-Clay, with the couple's three children. Photo: Supplied
Mr Byrne has reminded the jury not to consider media headlines about the case when considering the forensic examination of the Baden-Clays' house.
"You don't look at the headlines, you don't look at 'blood found in car, wife killer nabbed'," Mr Byrne said.
He said Mr Baden-Clay was an accountant working as a real estate agent with no expertise in "sanitising a crime scene".
Allison Baden-Clay's car when it was examined by forensic experts. Photo: Court Exhibit
Mr Byrne said the first police officers to arrive at the Baden-Clays' home found no sign of a struggle.
"No evidence of a violent killing," he said.
"Put all this into your melting pot when you come to consider the case."
The jury has returned.
Mr Byrne has now turned his attention to the "complete absence" of a crime scene at the Baden-Clays' Brookfield home.
He said Mr Baden-Clay invited police to his Brookfield Road house on the morning he reported his wife missing on April 20, 2012.
He said Mr Baden-Clay gave police consent to search his house and his cars.
At the time of Allison's death, the Baden-Clays' lived in this home in Brookfield. Photo: Court Exhibit
Mr Baden-Clay is seated in the dock wearing the same dark suit and glasses he has worn for the duration of the trial.
He is sitting upright in his chair with his hands folded in his lap.
On previous occasions Mr Baden-Clay has been hunched over a pad of paper furiously scribbling notes in the dock.
Gerard Baden-Clay in court on trial for the murder of his wife Allison Baden-Clay. Photo: Ten News
Mrs Baden-Clay's parents, Priscilla and Geoff Dickie, are seated in the front row of the public gallery.
The jury has taken a short morning tea break from the court room.
The jury will be given 10 minute breaks every 45 minutes, the first if which is now #badenclay— Caroline Overington (@overingtonc) July 7, 2014
"He could not determine a cause of death for Allison Baden-Clay," Mr Byrne said of forensic pathologist Dr Nathan Milne.
"And other means of death, such as toxicity, drowning, or falling from a height, cannot be excluded."
The court heard elevated levels of alcohol and traces of the antidepressant drug Zoloft were found in Mrs Baden-Clay's system. The court also heard levels of drugs and alcohol in the body can be falsely inflated during the decomposition process.
Mr Baden-Clay has pointed to his wife's history with depression throughout the trial to suggest she took her own life.
"The body was located in water beneath a bridge," Mr Byrne said.
He advised the jury to consider the cause of death as "starting point" for their deliberations.
Kholo Creek bridge. Photo: Supplied
"There's no cause of death and there's no injuries to be found," Mr Byrne said of the post-mortem examination conducted on Mrs Baden-Clay's body.
Mr Byrne said no bone fractures were found, no damage or fracture to the hyoid bone, no damage to the larynx, no haemorrhage or damage around the hyoid bone and larynx.
"That is the uncontradicted evidence of the pathologist," he said.
The larynx, otherwise known as the voice box, is supported by the hyoid bone in the throat.
The prosecution has suggested Mr Baden-Clay smothered his wife to death.
Gerard and Allison Baden-Clay. Photo: Supplied
Mr Byrne has turned his attention to the most crucial question of the trial.
"How did Gerard Baden-Clay kill his wife?," Mr Byrne said.
"How did he kill her? How did she die? What caused her death?
"Does the evidence even reveal how she did in fact die?"
The court has previously heard that no cause of death could be determined by forensic pathologists.
"There is no direct evidence that Gerard Baden-Clay killed Allison. There are no eye-witnesses. There are no admissions that he did that. The case on which the prosecution relies to prove his guilt ... relies on circumstances," Mr Byrne said.
"The circumstances: he was the last person to see her; he was with her on the night of the 19th. That's a circumstance.
"Does that prove he's guilty? Of course not."
The trial has attracted the largest crowd of curious onlookers and avid court watchers yet today.
The queue to the court building stretched more than 100 metres from the entrance to the complex this morning.
The proceedings are being broadcast live to two other courtrooms, including the ceremonial Banco Court, which seats 147 people.
"He has nothing to prove. The burden of proof is on the prosecution throughout this trial," Mr Byrne said.
"He does not have to prove anything to you, particularly his innocence. He relies upon the evidence which is before the court ...
"A person charged with a criminal offence in our system is presumed innocent."
"It's about the evidence," Mr Byrne said.
"You will not be satisfied beyond reasonable doubt that Gerard killed Allison. It is your duty to find him not guilty. It is not a favour to him."
Allison Baden-Clay. Photo: Supplied
"You are the jurors in the trial of Gerard Robert Baden-Clay. Ladies and gentlemen ... this is a murder trial," Mr Byrne said.
"If you have been following what's been happening outside this courtroom, you might be mistaken for thinking it's been a great big media event. It's not that. Nor is it a soap opera in which various titillating elements are brought out for the amusement of the media and it is not a whodunit play."
Court is in session.
Mr Byrne has started addressing the jury. He has displayed a PowerPoint slide to the courtroom.
The trial is in its final stages with the defence and prosecution to begin summing up their cases today.
Defence counsel Michael Byrne QC will be required to deliver his closing address to the jury first because Gerard Baden-Clay decided to give evidence.
A defendant who chooses to adduce evidence forfeits their right for their legal counsel to effectively have the last say in the trial.
Mr Baden-Clay is accused of killing his wife Allison at their home in the leafy western Brisbane suburb on April 19, 2012, and dumping her body in nearby Kholo Creek at Anstead.
He has pleaded not guilty to one count of murder.
Murder accused Gerard-Baden Clay. Photo: Michelle Smith