They should have taken that shooter (even though he was dead), and they should have strung his sorry ass up high upon the school flag pole, and left him there until the buzzard's reduced his low life carcass to nothing but a rack of bones. Guards should have been posted around the clock to ensure that he wasn't removed from that pole.
Every parent should have been able (if they could stomach it), to walk by and see what becomes of the body of a killer like that... Light's should be fixed on him for night time viewing, and the media should have to give a daily showing of his carcass hanging there until the time comes to cut him down.
The grocery store shooter should be brought there in a cage, and parked in front of it so he can view the body as it is being eaten by the buzzard's.
Now that's the way we show that these kinds of things aren't going to be tolerated any longer.
In Charleston S.C. it is told, that when pirate's came to do despicable unheard acts of terror, rape, and robbery to the people of that place, then it is said in historical document's that the pirate's we're hung by their necks until dead, and they were left upon the battery wall as a warning to other's who thought to follow in their foot steps when sailing into that harbor, that being a Pirate in Charleston SC was a terribly bad idea.