Harrison's life turned upside down on April 29, 2008 in his old North Philadelphia neighborhood when he allegedly got into a shootout with an old neighborhood nemesis. Long story short, Harrison has never been charged, but casings from the scene match a gun he admitted to owning. The Philadelphia DA at the time did not file charges, but everyone is lurking now with this excellent GQ article going into even more detail regarding the incident and the fact that the nemesis was eventually gunned down in his car.
Word came yesterday that the FBI is now looking into the Harrison incident. I'm not sure how all of this is going to end, but if it ends badly for Harrison, it will be due to him not being able to leave the old neighborhood and escape his demons.