After a 15-year-old school shooter pleaded guilty to all charges and was sentenced to life in prison, prosecutors argued he wasn’t the only one to blame. His parents were each convicted of four counts of involuntary manslaughter for failing to secure the gun and for gross negligence in not ensuring their son got the mental health care he needed. They were sentenced to at least 10 years in prison. It is the first time that parents in the U.S. have been held criminally responsible for a mass school shooting committed by their child. “There was plenty of red flags,” says Steve St. Juliana, whose 14-year-old daughter, Hana, was killed in a school shooting in Oxford, Michigan, in 2021. Prosecutors say the gunman had texted his mother on multiple occasions that he saw demons. And his parents were called in when a teacher saw his math worksheet had drawings of a gun, a bullet, and a person bleeding, along with the words: “the thoughts won’t stop, help me” and “blood everywhere.” His parents b...