Investigators locked onto a suspect in the killing of rapper MO3 because surveillance showed he wore identical underwear two days straight. The FBI testified that footage from the day before the murder captured a man with a rifle in blue underwear, then the same guy returned to the home on the actual day with a rifle and matching colored undies before heading to burn stuff in a backyard. Dash cam video of Melvin Noble's death also shows the shooter in light-colored possibly blue underwear.