Aaron James Holliday trial drawing to a close

That's how prosecutors have described a man's alleged plot to use $7000, a car and his computer skills as downpayment for the abduction and murder of two witnesses in his upcoming child sex trial.

The trial of Aaron James Holliday, 28, is now drawing to a close, and the jury was sent out to begin its deliberations on Monday afternoon.

Holliday is accused of planning to pervert the course of justice and incite kidnapping and murder in 2010.

Holliday was behind bars at the time and awaiting a trial on child abuse charges against three boys, aged 12 to 15.

The Crown, led by prosecutor Shane Drumgold, alleges he enlisted another inmate to help him beat the charges.

The plot allegedly involved kidnapping two witnesses, forcing them to read scripted statements on film, before making sure they disappeared and never got to court.

Police raided Holliday's prison cell in July 2010, finding a document allegedly outlining the plan, and scripts for the children to read.

Mr Drumgold, during his closing submission to the ACT Supreme Court jury, said a high risk plan can be just as illegal as a low risk plan.

"This was a stupid plan," he said.

"But a stupid plan ... is just as illegal as an intelligent plan."

Holliday himself gave evidence on Friday and Monday, arguing it was the other inmate behind the plan.

He said the inmate had persistently questioned him about his case, saying he could help out and knock off the witnesses.

Holliday said he resisted, but eventually began feeding the inmate false information to get him off his back.

He said he told a guard and his lawyer about the actions of his fellow inmate.

The document found in his cell had been originally written by the other inmate, Holliday claimed, and some of the other seized material was part of a fiction novel he was planning.

The jury was sent out about 3.20pm.

Their deliberations will continue on Tuesday.