So that's why my brains leaked out!

I'm fascinated and terrified of stories like this one... A man gets shot in the head but doesn't realize it until years later. In this story, a guy was drunk and partying on New Years Eve FIVE YEARS ago, got shot by another partier and they didn't figure it out until he found a lump in the back of his head recently.

Here's what scares me : What if I got shot in college but for whatever reason didn't know it? I'm not so concerned about my health, I just would have a hard time tracking down the perp. There's a long line of people behind that smoking gun.

How about you? If you found out you had a bullet in your head tomorrow, who would be your prime suspect?