Richard Pusey will remain behind bars over the April crash, in which a truck hit four officers testing the mortgage broker for drugs and impounding his car on Melbourne's Eastern Freeway.

The 41-year-old avoided being struck but is accused of recording the scene instead of helping a dying Senior Constable Lynette Taylor as she groaned for help.

"While his actions in seeking to record the aftermath of the collision were highly intrusive and morally repugnant, the filming was not illegal," magistrate Jo Metcalf said .

She ruled he posed an unacceptable risk of committing offences and endangering public safety if released.

Pusey faces 12 charges including driving at a dangerous speed, reckless conduct endangering life, destruction of evidence, perverting the course of justice, failing to remain at the scene after a drug test and failing to render assistance.

But Ms Metcalf raised the possibility some of the more serious charges might not stick.

"There is a prospect Mr Pusey may ultimately be acquitted of more serious charges," she said.

"There are potential legal issues in relation to the charge of failing to render assistance, around Mr Pusey's control of the vehicle at the time of the collision, given that he was not driving it at the time, nor was his vehicle responsible for the collision."

Pusey's barrister, Vincent Peters, had taken issue with Victoria Police's interpretation of some of the evidence, particularly around charges of failing to remain at the scene and help.

He earlier argued his client was in shock after witnessing a horrific crash, adding there was little the man could have done given doctors arrived at the scene.

Prosecutors said Pusey had been a trained nurse but instead chose to film the scene for more than three minutes, making derogatory remarks, before leaving and sharing pictures and footage including with a federal police officer.

Pusey was accused of walking up to Sen Const Taylor and saying: "All I wanted was to go home and have my sushi and now you've "f***ed my f***ing car."

Senior Constable Kevin King and Constables Glen Humphris and Josh Prestney were also killed when the truck ploughed into the group on April 22.

Pusey had been prescribed anti-psychotic medication and Ritalin, likely has ADHD and an antisocial narcissistic personality disorder, according to a psychological report.

Pusey also struggled with narcissistic rage, a daily fear of being arrested and fantasised about killing people, the report said.

A month before the crash, he allegedly boasted to a mate about speeding at 300 km/h along the same freeway, where the limit is 100.

He was also allegedly captured doing 247 km/h along the Monash Freeway, including 160 km/h through roadworks.

The court was told other allegations against the man included threats to set himself alight at a debt collection agency and drive down Bourke Street, in an apparent reference to James Gargasoulas' deadly rampage.

Ms Metcalf acknowledged Pusey's case would likely be delayed because of the coronavirus pandemic, with a contested committal hearing not expected until 2021 and a trial possibly not until 2022.

He is next due to appear in court for a committal mention on July 16.

Australian Associated Press