WaPo notes how often mass shootings are perpetrated by, well, young adults:
“Age is the untold story of all this stuff,” said [Vanderbilt University psychiatrist Jonathan Metzl], who is also a sociologist. “I feel very strongly we should not have people [ages] 18 to 21 with guns.”
A key omission is the police. As far as I’m concerned, the youngest a police cadet should be is somewhere in their 28th year or so, when the brain has finished its wiring and the adult has some experience with the world, a chance to shed some of those delusions that just about all of us, including me, have as we enter legal, if not physical, maturity.