The dead is dead. But, sometimes you have to be mindful of the living. This person may have been somebody's son, husband, brother and father. In the original post he was a teacher so there may be children who want an explanation.
Agreed. No fatality is a cause for celebration. Relief of a bad situation (such as stopping someone on a rampage) is, but ought to be done in an adult manner.
We never know why someone does this.
Beg to differ, sometimes we have an excellent idea why someone goes off. Sometimes folks leave extensive records, diaries, medical records, or impressions absorbed by others around them. SOmetimes it can be as starkly obvious as a skull X-ray or a blood chemistry result.
If at the scene of something like this do you just go up to the distraught family or his students and say "the SOB got what he deserved". Or, do you try to keep the justification for the shooting a separate issue and try to put your prejudices away to offer some support to the living.
Right, no high fives, no getting in people's faces. But they may not want to hear anything from you. Best to let someone with experience and training in handling theses sorts of experiences handle it if possible, or at least a neutral person in authority, say a pastor/priest/rabbi or such.
What if a student was really having a difficult time processing this event and you might have been the one person they had been taught they could trust? Unlikely as a paramedic or EMT.
But, you are too wrapped up giving high 5s to the police for killing a decedent to care.Again, have to rein it in and maybe at least pretend to be an adult.
Even the officer will need some support later. Maybe.
In this thread the OP also mentioned "volunteer" which might lead one to assume it is a small community. The Police may even have known this man which does not make it any easier.True that.
While some might say there should have been signs, usually there are not.No. Actually, there are usually signs, but the people involved either don't recognize them, or they try to protect the person going off the deep end. Enablers and deniers are often involved with this sort of thing, as they are with alcoholism etc. If the UniBomber's brother decided not to continue doing that (as his mother wanted to continue doing) he might still be free and others hurt.
If there were maybe more suicides could have gotten help and maybe some mass tragedies could have been prevented. See above. Mental first aid and "buddy care" is not taught except as a reaction to disasters.