And cops aren't psychiatrists - they are law enforcement officers. They have limited powers for a purpose. The dude should have been handled differently by those who knew him well - calling the cops for a case like this is a cop-out, not a solution.
Agree that there was a time in America when no government involvement would have been necessary. Rodger’s father perhaps accompanied by one or two male relatives should have marched into his deranged son’s apartment not only confiscated the guns but cut off the money spigot that made the drugs, BMW and the purchases of guns and ammo possible. Fathers have to behave as men.There have always been deranged people that were straightened out in a variety of ways.