Kelly Thomas, a 37-year-old homeless man with schizophrenia, kept calling for his father as police beat and tased him repeatedly.

But his father, a retired Orange County sheriff’s deputy, was not around.

It wasn’t until after Thomas slipped into a coma and was hospitalized with multiple injures that his father saw him.

And by then, it was too late. Thomas never recovered. The 160-pound man died five days after his run-in with Fullerton police.

Now investigators are looking for witnesses as to what took place the night of July 5 when police responded to reports of someone breaking into cars.

So far, one video has surfaced, that doesn’t show much of what took place, but does allow us to hear Thomas’ cries for help as well as the reaction from witnesses.

The Los Angeles Times reports that Thomas began struggling when officers attempted to search him.

His father said his son was probably off his medication.

 “When I first walked into the hospital, I looked at what his mother described as my son … I didn’t recognize him,” Thomas said. “This is cold-blooded, aggravated murder.”

Hopefully there are more videos out there.