The grieving family of a 28-year-old man bludgeoned to death on his walk home through Mandurah have pleaded for public help to piece together what happened.
Tauri Litchfield's sister Kirra said they needed answers about why her little brother - an outgoing, caring and happy man who loved his partner Lisa and the water - was killed on Sunday night on his short walk home from an afternoon out with friends.
"He was so loving and loved by so many people," she said "It's a fog and the only way we're going to get through the fog is if we can find out what happened on that night. "It's going to shape the rest of our lives the information that we have."
Mr Litchfield was found with severe head injuries outside a Pinjarra Road business about 8.15pm and died in hospital.
Police believe he was bashed about an hour earlier and a group of people were seen confronting him near the intersection of Pinjarra and Boundary roads just after 7pm.
Mr Litchfield was found about 20m from an injured 17-year-old girl and one theory being investigated is whether he was murdered after he tried to stop an attack on her.
Detectives are still unsure whether the two bashings are linked and are trawling through security vision from nearby businesses to try to piece together what happened.
Major crime squad Det-Insp Gene Pears said police also wanted to track Mr Litchfield's movements after he left the Brighton Hotel about 5.30pm.
His partner Lisa went to see a friend and he was planning to head home.
Police said the 28-year-old was last seen walking along the Mandurah Traffic Bridge towards Halls Head.
"Between 5.30pm and 7pm is critical for us to piece together," Det-Insp Pears said.
Mr Litchfield, a Victorian, moved to WA with Lisa more than a year ago because of his love for the water.
An avid surfer and kitesurfer, Mr Litchfield even found a job that enabled him to spend time around boats, working as a sail-maker.
"My little brother, he was just such an outgoing and charming man," Ms Litchfield said. "He had this huge enthusiasm that just kind of sprung out of him... you can see it in his smile."
His girlfriend Lisa said : "He was always happy, that's who he was".Ms Litchfield said her family had been overwhelmed by the support they had received since his death but pleaded for anyone with information to come forward.
"Even if you think it's unimportant... it could piece together the pieces that we need to move on," she said.
"He was just walking home. He didn't have far to go at all."
Police said there would have been many people in the area because it was the last day of the Mandurah Crab Fest and St Patrick's Day.
They want to speak to anyone who saw Mr Litchfield or the group of people in the area that night.
Police did not provide any descriptions of the group.Anyone with information is asked to call Crime Stoppers on 1800 333 000.
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