Nancy Bernstein, ex-wife of slain Las Vegas attorney Joseph Houston, is suing his killer's family and law firm, Joseph Houston Law, alleging they helped plan or had prior knowledge of the attack. The lawsuit claims that Dylan Houston, Joseph's son, helped his father execute a plan to kill a prominent Las Vegas lawyer and his wife, Dennis Prince, and Ashley Prince during a custody battle deposition. The final report on the shooting found no evidence of Joseph Houston telling anyone his plans to kill the two, according to Metro’s final report. The complaint alleges that Dennis Prince was representing Ashley Prince in a custody dispute with her ex-husband, Dylan Houston. The trial is set to begin in September.