The criminal didn't die in the attempt, so didn't remove himself from the gene pool.
Not the criminal, the guy that did the mug smashing.... he told a reporter "There are only a few videos like that on YouTube now, so mine's going to be the best, That'll teach this guy." and then posted the video on Youtoube. I would think that would enrage the punk that attempted the robbery enough to cause him to come back to the donut shop with a weapon and teach the clerk a lesson ending in death...