Peter James Loeschnauer, 28, was allegedly drunk, on drugs and speeding when he rear-ended a Toyota Corolla driven by Lachlan Seary on the Monaro Highway near Hume on March 8.

Police have said the impact of the collision spun the 19-year-old Canberra Brave player's vehicle off the road and into a tree.

Mr Loeschnauer has been charged over the fatality with manslaughter, aggravated dangerous driving, drink-driving and drug-driving.

He was not required to appear in the ACT Magistrates Court on Thursday morning when his lawyer, Tom Taylor, mentioned his case for the first time.

"I anticipate I'm going to be making some representations to the Director [of Public Prosecutions'] office," Mr Taylor told Magistrate Beth Campbell.

"The charges are serious, as Your Honour will see."

Ms Campbell granted a six-week adjournment, listing the matter to return to court on August 5.

After charging Mr Loeschnauer earlier this year, ACT Policing said speed cameras on the Monaro Highway had captured the 28-year-old's Honda Civic travelling at 149km/h in a 100km/h zone "immediately prior to the collision".

Further analysis of CCTV recordings from along the highway were said to show he had also been rocketing along at more than 160km/h in an 80km/h area "moments before" the impact.

"Investigations indicated that after being hit from behind, the Corolla was spun from the roadway into the centre median where it rolled and struck a tree," police said in a statement in April.

"The driver of the Honda Civic, who was not injured, provided a positive screening test for alcohol and drugs at the scene, and was conveyed to hospital for mandatory blood testing."

Mr Loeschnauer allegedly returned a blood alcohol reading of 0.186 - nearly four times the legal limit - and a positive result for MDMA.

Detective Inspector Donna Hofmeier has previously described Mr Seary's death as senseless and completely avoidable.

"As a result of one man's reckless actions, a young man has lost his life in the most tragic circumstances," the senior police officer said.

"The 19-year-old was a completely innocent party in this collision.

"There was no street racing and no interactions between the two drivers before the two cars collided.

"We regularly say we are frustrated with drivers that do the wrong thing but in this case it's more than frustration, it's a sense of needless loss.

"We have a young man dead and another facing serious criminal charges for his actions."

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