Well...
Good start at least, I would have added more animation, the black into scenes could all be livened up if it showed the guy sitting around watching his family in flashbacks or something.
I would have made the brain scene much quicker, sortof like CSI when they do a quick cutscene that almost startles you. This wasn't quick enough.
Finally I would have made the flash longer, and tried to develop a bit more character and storyline. It's hard to identify with a random murderer.