4th homeless man in month killed in S. Calif. (AP) - Police detained a man in connection with the latest stabbing death of a homeless man in Orange County as a task forced investigated if there were any links to the slayings of three other homeless men, believed to be the work of a serial killer. Friday near a fast-food restaurant at the intersection of La Palma Avenue and Imperial Highway in Anaheim, police said. Witnesses followed a man who ran from the restaurant parking lot and led police to him, Anaheim police Deputy Chief Craig Hunter told the Orange County Register. He was taken to the Anaheim Police Department for questioning. Police set up a massive containment area at the crime scene in a search for the killer and scoured nearby neighborhoods, including a mobile home park, the Los Angeles Times reported. A task force of law enforcement officers from Anaheim, Placentia, Brea, Orange County Sheriff's Department and the FBI was formed to investigate the killings of three other homeless men found stabbed to death in north Orange County since mid-December. It was not known if the latest death was connected to the other killings, but the Times said the task force is investigating any possible links. Authorities did not release any information on the man they took into custody. The Register said they declined to speculate if he was behind the earlier homeless slayings, but Hunter acknowledged that "in a very general sense" he matched the physical description of person suspected in the killings.