or double strike it almost looks like his hair ? but looks like the moment he got shot would make a nice conversation piece
Post mint damage. Your coin looks like it also was exposed to heat. Could be solder or something similar. I've heard stories where copper cents were used to jumper fuses and that may be something to consider. Regardless of the cause, it doesn't look like any type of die failure or mint error.
Before even reading the comments (I'm new to coin collecting and don't know much about errors) I assumed it was post mint damage... DEFDAM
Appears to me like some foreign matter on the coin. Have you tried soaking it in acetone and then prodding it with a toothpick? I've seen copper pennies that were used to clean the tips of old soldering irons, leaving a deposit that takes on the color of the cent while in circulation, so it might be one of those. Let us know what you find.