Rivera has told investigators from the prosecutor's office that he smoked "wet," a combination of marijuana and PCP, before the killing, which took place early Sunday morning. PCP, which has been known to cause vivid hallucinations, has also been linked to the Aug. 23 death of 2-year-old Zahree Thomas in Camden. Thomas's mother, Chevronne, is believed to have smoked wet before allegedly decapitating her son.