For Christine Allen, the loss is personal. She remembers meeting James McGillivray at a local shelter. He's one of the victims, police say, was murdered by a serial killer.
"It just hurts. We're just homeless, we're not doing anything wrong. It's not our fault," says Allen.
In addition to McGillivray, two more men were stabbed to death in just 10 days.
The search for the suspect has turned up new clues, after the Homeless Homicide Task Force put up a road block Tuesday night.
Investigators estimate hundreds of people drove through the Bradford Avenue traffic stop in Placentia, and they say talking to people one on one made a difference.
"Maybe someone, through all this information, dismissed some information as maybe trivial?" says Sgt. Bob Dunn of the Anaheim Police Department. "Having a conversation face to face might spur a little thought on their part, to share with us a little more information."
A mobile command center is staffed around the clock, as detectives continue to piece together tips from the public, and there have been more calls coming into the task force hotline.
Police believe the suspect was captured on a blurry surveillance tape, and they continue to search for a white Toyota Corolla seen near the scene of the first murder.
As for the county's homeless, they continue to band together and watch out for one another.
"That adds a lot to the plate," says Zach who is homeless. "We have enough problems that we have to deal with while we go to sleep out here, anyways. I don't know if they're doing their job."
"I wish they'd catch this guy and hang him," says Allen.