Common sense be damned. No one can do anything, no one is at fault because everyone must obey the law to the letter and follow due process. There is no room for common sense.☺ ☺
If they can take the guns from one person without due process, they can take them all.
But I am not saying they should have done nothing, they should at least have admitted him to a psych ward for 72 hours of observation while the DA sought an order from a judge to remove guns from the home.