In this holiday episode of 'Serial Killers,' we explore a chilling 1996 case at Glendale Adventist Medical Center, where a series of suspicious patient deaths prompted fears of a serial killer among staff. The investigation centered on Efren Saldivar, a respiratory therapist linked to these deaths. Despite his shocking confession to killing numerous patients using drugs like Pavilon and succinylcholine, law enforcement faced significant challenges in securing a conviction due to the lack of physical evidence. The narrative highlights the critical role of analytical chemistry and collaboration with Lawrence Livermore National Laboratory in confirming the presence of these drugs in exhumed tissues, ultimately leading to Saldivar’s arrest and plea deal.