Okay, here we go:
“In June 2021, police in Broome County were called by high school officials who told them Gendron had threatened violence in comments made to fellow students, the News reported.
“A school official reported that this very troubled young man had made statements indicating that he wanted to do a shooting, either at a graduation ceremony, or sometime after,” the same government official familiar with the case told the News.
State Police were sent to investigate and Gendron, under a section of state mental health laws, was referred for a mental health evaluation and counseling, the official told the News.
So he had a history.