Gonna try to save this to prevent it being closed as a drive-by. The link is about 40 cal. pistols not stopping bad guys after 2 high profile incidents in Pittsburg even after being hit multiple times. The ammo was tested and shown to work normally.
I think this is a good example of how at times some people just don't want to die. There are many examples of people who have been shot multiple times and just keep on going.
Here is a good example