The woman who did not wish to be named, read a statement to Melbourne radio 3AW on Monday, making it clear Richard Pusey, 41, had been estranged from the family for some time.

She said the family had been thrust into the spotlight following the fatal crash on the Eastern Freeway on Wednesday and shared the same feelings of devastation as the wider community.

“I want to read a statement on behalf of the Pusey family because we want to disassociate ourselves with the tragedy that occurred on Wednesday night,” she said.

“We were incredibly shocked and deeply ashamed by the (alleged) events that unfolded surrounding the accident and thereafter.

“Our family have [sic] been under public scrutiny since that time in a quest to find some explanation as to Richard’s (alleged) actions in this catastrophic event.

“This is an insight we are unable to provide.”

The alleged events referred to are now before the courts. A 47-year-old truck driver has been charged with four counts of culpable driving causing the deaths of the four police officers.

Senior Constable Lynette Taylor, Senior Constable Kevin King, Constable Glen Humphris and Constable Josh Prestney died when a semi-trailer crashed into them while they were trying to impound a Porsche in an emergency lane on the freeway at Kew.

Pusey, of Fitzroy, was charged on Friday with nine offences including driving at a dangerous speed, reckless conduct endangering life, failing to render assistance and drug possession.

He remains in custody on remand.

Earlier on Monday, the 47-year-old truck driver was charged with four counts of culpable driving.

The Cranbourne man had been in hospital since the crash and was charged after a joint investigation by the major collision investigation unit and the homicide squad.

He is due to appear in the Melbourne Magistrates Court on Monday.

Taylor, King, Humphris and Prestney died when the truck crashed into them about 5:30pm on Wednesday after they had intercepted a Porsche on Melbourne’s Eastern Freeway at Kew.

The four officers had been standing in the emergency lane of the freeway as they prepared to impound a Porsche 911 that was being driven by 41-year-old Melbourne mortgage broker Richard Pusey.

Police allege Pusey was driving at 149km/h when they made the decision to pull him over.

Victoria Police Chief Commissioner Graham Ashton said on Thursday the truck 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 100km/h.

The officers all died at the scene.

Senior Constable Kevin King, Leading Senior Constable Lynette Taylor, Constable Joshua Prestney and Constable Glen Humphris were killed in the crash last Wednesday. (Supplied: Victoria Police)

The driver of the truck, from Cranbourne, had been in hospital since Wednesday night after suffering what Ashton described as a “medical episode … which seemed to involve him blacking out”.

He was released from hospital and questioned by police about the crash for the first time on Sunday night.

He was charged after a joint investigation by the Major Collision Investigation Unit and the Homicide Squad, police said in a statement released early this morning.

Tributes to the four officers were left outside the Boroondara Police Station last week. (ABC News: Billy Draper)

He is due to appear in Melbourne Magistrates’ Court today.

Police last week conducted a search of the truck driver’s home.

Pusey has been charged with nine offences including reckless conduct endangering life, failing to render assistance and drug possession.

– AAP with additional reporting by ABC / © 2020 Australian Broadcasting Corporation. All rights reserved.