Article Photos: Police analyze PCP after 2 NJ children killed



  Camden, N.J. Police Chief Scott Thomson, left, and Camden County Prosecutor Warren Faulk attend the arraignment of 31-year-old Osvaldo "Popeye" Rivera of Camden, who is accused of killing a 6-year-old boy while high on PCP-laced marijuana, Tuesday, Sept. 4, 2012. Prosecutors say Rivera slashed the throat of the boy, who was trying to save his sister as she was being assaulted on the floor during a middle-of-the-night attack on Sunday. (AP Photo/Camden Courier-Post, Chris LaChall, Pool)

Camden, N.J. Police Chief Scott Thomson, left, and Camden County Prosecutor Warren Faulk attend the arraignment of 31-year-old Osvaldo "Popeye" Rivera of Camden, who is accused of killing a 6-year-old boy while high on PCP-laced marijuana, Tuesday, Sept. 4, 2012. Prosecutors say Rivera slashed the throat of the boy, who was trying to save his sister as she was being assaulted on the floor during a middle-of-the-night attack on Sunday. (AP Photo/Camden Courier-Post, Chris LaChall, Pool)