The family of 53-year-old grandfather Elmars Kalejs have spoken out and are desperate for answers after he suffered serious head injuries that months later claimed his life.

Some of Kalejs final moments of normality were caught on CCTV, but what happened to him just hours later remains a mystery.

The 53-year-old had been sleeping in his car at the Settlers Common Environmental Centre in Bedfordale.

On April 18 about 12.30pm he was found lying injured next to his silver Holden Commodore.

He was rushed to Royal Perth Hospital with bleeding on the brain, broken ribs and a collapsed lung.

He stayed there for more than 60 days, dying from his injuries on June 24.

“He was able to start talking again, and then, unfortunately, he went downhill and we lost him,” daughter Courtney Mallard said.

“We just want to know what happened, and put our mind to rest.”

Police are also putting out the call for more information.

“Elmars wasn’t in the state where he could tell us what happened, hence why we’re still here now trying to figure that out,” Detective Senior Sergeant Jarrod Manson said.

The homicide squad has been called in, trying to piece together the 24 hours before the grandfather was discovered.

CCTV from a Maddington shopping centre showed the clothes he was wearing.

“We’re still unsure of how these injuries have occurred. It may be from a vehicle and it may be from an assault, and that’s what we’re here trying to figure out,” Manson said.

Flyers of information will be put into food hampers and handed out to homeless people in the area in the hopes someone knows something.

A mobile police unit has also set up at the old Armadale courthouse until tomorrow.

“Please just help if if you know anything,” Mallard said.

“It’s OK, we forgive anyone who’s done it, please just come forward. We just need closure as a family.”

Anyone with further information has been urged to contact police or Crime Stoppers on 1800 333 000.