Actually Pam, I watched that situation unfold live (I was in the hospital recovering from the birth of my first child- almost 18 years ago) and the man involved pulled a gun out of a manilla envelope, spoke a few words (while everyone gasped) and as soon as someone rushed towards him he put it in his mouth and fired. I don't think you can compare the circumstances at all. The people in that room had no idea if he meant to harm others and had no time to evaluate the situation. They were filming him because he was making an important statement at a press conference.
This neighbor was not dealing with a suicidal adult, but a child who could easily be outsmarted. I think it is disgusting that the neighbor stood by and allowed, what they KNEW to be, a potentially dangerous situation continue.