Police expect to charge the man who crashed into a taxi on Christmas Day, killing its driver and injuring a family in a separate vehicle.
Inspector Bernie Rankin said there was "no doubt" that the criminal investigation into the Geelong crash would result in charges for the man, who was the only person in his car. Speed and alcohol are being investigated as being possible causes for the crash.
The driver was interviewed for several hours after the incident and released.
The taxi driver, a member of the local Pakistani community and a father of five, died at the scene. Inspector Rankin said the family, which was in a vehicle waiting at traffic lights adjacent to the taxi, were lucky to have escaped serious injury.
A woman who may not have witnessed the crash but police believe spoke to the family at the scene is being urged to come forwards to help with the investigation.
"We really need to speak to her, hoping she can clarify some things for us," he said.
Police are appealing for motorists to drive sensibly as they struggle to make sense of what they called a "horrific" start to the holiday road toll period.
Three people died on December 23 alone – the first day of the holiday road toll period – in separate incidents, including a man in Dandenong on Christmas Eve. Inspector Rankin said all were avoidable collisions.
"Unfortunately in our community, there's a group of people that just don't listen," he said.
"If you drink don't even think about getting behind the wheel of the car. If you're going somewhere, it doesn't matter if you're a few minutes late; rest, have a break."
Police have been left shaking their heads in recent days over what they describe as reckless behaviour.
A New South Wales teen had his car impounded on Wednesday after he was caught travelling more than 70 kilometres over the speed limit in Seymour.
The 17 year-old was clocked driving south on the Hume Highway at 181km/h in a 110km/h. The P-plater had his car impounded for 30 days and is expected to be charged with several offences including conduct endangering life.
Meanwhile, a 31-year-old Malvern East man will face court after he was caught speeding and drink-driving Frankston South on Wednesday morning.
The man was driving on the Moorooduc Highway when Frankston Highway Patrol members caught him allegedly travelling at 124km/h in an 80km/h zone. A breath-test returned a result of 0.06.
Police are also urging a man photographed by a member of the public driving on the Eastern Freeway with both of his feet hanging out of the window on Christmas Eve.
Inspector Rankin said the stupidity of the driver "astounds us".
"The local police will be following this matter up and what I'd encourage the driver of this vehicle to do is he walk into his local police station and speak to us," he said.
The national road toll stands at 10, including five in Victoria, two deaths in South Australia and one each New South Wales, Western Australia, and Tasmania.