The Porsche driver who allegedly fled the scene of a freeway crash which killed four police officers was filmed heaping abuse on one of the victims and complaining about the damage to his car, a court has heard.

Key points: Porsche driver Richard Pusey, 41, has been charged with failing to assist at the scene of the crash

Porsche driver Richard Pusey, 41, has been charged with failing to assist at the scene of the crash He has also been charged with reckless conduct endangering life, speeding and failing to remain after a drug test

He has also been charged with reckless conduct endangering life, speeding and failing to remain after a drug test Victoria Police Chief Commissioner Graham Ashton said he was "deeply touched" by the outpouring of sympathy from the community since the crash

Leading Senior Constable Lynette Taylor, Constable Glen Humphris, Senior Constable Kevin King and Constable Josh Prestney were killed in the crash on the Eastern Freeway in Kew.

The four officers were standing in the emergency lane when the truck hit them as they prepared to impound the Porsche 911 being driven by 41-year-old Melbourne mortgage broker Richard Pusey.

Mr Pusey was allegedly travelling at 149 kilometres per hour while under the influence of methylamphetamine and cannabis before he was pulled over.

He made a brief appearance in Melbourne Magistrates' Court on Friday morning charged with nine offences including speeding, failing to assist at a crash scene and drug offences.

Senior Constable Aaron Price told the court Mr Pusey had walked to the grassed side of the emergency lane to urinate just before the truck veered into the cars.

"All I wanted to do was go home and eat my sushi, you've f***ed my f***ing car," Leading Senior Constable Taylor's body camera is alleged to have recorded Mr Pusey saying to her, before fleeing the scene.

She was pinned under the truck at the time.

Senior Constable Price told the court Mr Pusey videoed the crash scene before fleeing, however there was no evidence he posted the material on social media.

Mr Pusey had two phones on him at the time of the incident but only surrendered one to police, which had been restored to factory settings, Senior Constable Price told the court.

Police allege Mr Pusey received a lift from a passer-by and was dropped at the corner of Smith Street and Alexandra Parade in Collingwood.

Senior Constable Kevin King, Leading Senior Constable Lynette Taylor, Constable Josh Prestney and Constable Glen Humphris have been remembered as officers who were passionate about keeping the community safe. ( Supplied: Victoria Police )

Accused contacted officers the night of the crash, court told

In the hours after the crash, Mr Pusey contacted two police officers he knew — one of them at the Australian Federal Police, the other with Victoria Police.

He sent an email to one of the officers telling the officer what had happened before going to sleep, the court was told.

On Thursday morning he took a lawyer to the City West police station at Spencer Street and was interviewed by police.

Police searched Mr Pusey's Fitzroy home on Thursday afternoon.

Senior Constable Price acknowledged his fallen colleagues when he gave a brief summary of the case to the court, paying respects to them and their families.

Mr Pusey was remanded in custody until July 17.

When asked about the allegations against Mr Pusey at a press conference on Friday afternoon, Police Minister Lisa Neville said: "Based on the alleged reports I've heard today, it's completely sickening and disgusting."

At the same press conference, Police Association secretary Wayne Gatt said: "I think this week four police heroes died and one coward lived".

Bouquets and tributes to the officers have been left outside the Boroondara Police Station. ( ABC News: Billy Draper )

Police await clearance to interview truck driver

Police are still waiting to interview the driver of the refrigerated truck, which Chief Commissioner Graham Ashton said appeared to have moved from the right-most lane of the freeway to the emergency lane shortly before it hit the officers while travelling at 100kph.

The truck driver remains in hospital after suffering a medical episode, but Chief Commissioner Ashton on Friday afternoon said investigators hoped to be able to interview him later on Friday.

"The driver of the truck has been in medical care at hospital and we have an opportunity to have him reassessed, as we speak pretty much, by the forensic medical officer so we're hopeful of getting clearance to interview him later today," he said.

Earlier, Chief Commissioner Ashton said on Thursday officers had searched the truck driver's Cranbourne home in the hours after the crash and "what was found at that premises is still the subject of ongoing investigation".

Chief Commissioner 'deeply touched' by outpouring of sympathy

Chief Commissioner Ashton said police were appreciative of all the support they had received from the community since the incident.

He said 142,000 messages of condolence had been left on the Victoria Police Facebook page.

"I was personally deeply touched by the depth of condolence and well wishes in those comments so we're very, very grateful," he said.

Victoria's Parliament House was among the buildings in the CBD illuminated in blue to honour the officers. ( ABC News: Richard Willingham )

Last night, Melbourne landmarks were illuminated in blue in tribute to the two senior constables and two newly graduated constables killed in the crash.

Physical-distancing measures in place due to the coronavirus pandemic means no public vigil is possible to mark what is the biggest loss of officer lives in a single incident in Victoria Police's history.

Flinders Street Station in the heart of Melbourne's CBD was among those to turn blue. ( ABC News: Gemma Hall )

Victoria Police Legacy CEO Lex de Man said the public's desire to pay tribute highlighted the "devastation" being felt in Melbourne.

"Last night, the outpouring of support and comfort that Victorians showed by lighting up buildings in blue and putting blue ribbons on their gates and blue lights around their houses, that's some comfort for the families," he said.

The organisation, which provides support to families of fallen Victoria Police officers, has set up a remembrance fund for the four officers killed in the crash.

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Watch Duration: 2 minutes 2 m Victoria Police Legacy CEO Lex de Man said community tributes highlighted the widespread grief over the deaths.

The Victoria Police badge was projected onto the walls of the closed National Gallery of Victoria. ( ABC News: Gemma Hall )