Police will be setting up a pre-dawn intercept of vehicles as part of their investigation into the death of a homeless man in Dandenong North on 2 December.
Homicide Squad detectives will stage the intercept point at Carlton Road, near Gladstone Road, between 5am-6am on Wednesday 4 December.
They are seeking witnesses or dash-cam footage in relation to a fight between the victim and another man on Carlton Road about 5am on Monday 2 December.
Police are also seeking witnesses who saw a man chasing another man on Gladstone or Carlton roads around the same time.
Information is also sought on a man acting suspiciously in front or rear yards in Dandenong North that morning, particularly anyone wearing a dark check shirt and shorts.
Police say a 26-year-old woman contacted police after seeing the victim acting suspiciously in the front yard of her home in Gladstone Road.
Her 31-year-old male partner confronted the victim and followed him to Carlton Road where the pair fought.
The victim sustained life-threatening injuries and died in hospital several hours later.
The other man suffered minor injuries during the altercation and was taken to hospital.
He was later taken into custody and released pending further enquiries.
Any information to Crime Stoppers on 1800 333 000 or www.crimestoppersvic.com.au