 A motive has not been determined, but authorities say the suspect who confessed to the shooting has had previous mental health and drug issues. For the first time, the Livingston Parish Sheriff's Office has arrested three people on charges of second-degree murder for their roles in three overdose deaths from methamphetamine and fentanyl. Sheriff Jason Ard says murder charges related to overdose deaths are rare since detectives must prove that someone gave out a particular controlled substance that led to their death.