The fact they still haven’t been caught despite all the attention this has gotten so far tells me the shooter knew what they were getting into & was prepared for it. Legally speaking, I think that eliminates a “temporary insanity” defense, but I don’t think it should. Someone despondent over losing a dearly loved one due to the completely arbitrary, cynical, and sometimes outright ghastly “healthcare” system we live under refusing to provide the service they were paid for seems like something that would lead to a temporary insanity that just lasts a very long time.