Charging the parents of school shooters should become standard practice

Prosecutors in the recent Michigan school shooting by a 15-year-old student that left four dead also have filed manslaughter charges against the shooter’s parents, whose gun he used. This should become standard practice for school shooting cases when the young shooters are only armed because of their parents’ carelessness. The uniquely modern, uniquely American phenomenon of mass school shootings is undoubtedly tied to the proliferation of guns and the loosening of gun restrictions that has happened throughout the U.S. in the past few decades. Tragedies like the one that played out in Michigan...