Police are looking for people who they believe traveled past the scene where a 28-year-old man was being bludgeoned to death in Mandurah on Sunday.
Detectives investigating the death of the Greenfields man Tauri Litchfield have called for people in the vicinity of Pinjarra Road at about 7.15pm to come forward.
Mr Litchfield was found with severe head injuries outside a Pinjarra Road business at about 8.15pm and died in hospital.
Police said they are particularly interested in speaking to people who were believed to be traveling in a while people mover van east along Pinjarra Road before, during and after the attack.
The van was towing a box trailer at the time.
Police also want to speak to two people who walked east along the road and were at the corner of George Street after the attack.Those with information are asked to contact Crime Stoppers on 1800 333 000.
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