Earlier this year, President Barack Obama pardoned Tennessee resident Roy Grimes for altering and depositing a money order back in 1960. Grimes, who had no other criminal record, decided he wanted to start collecting guns, something he couldn't do before as a convicted felon. But the Tennessee Bureau of Investigation says a presidential pardon is worthless in the Volunteer State. The TBI says state law says convicted felons can't own firearms and it contains no exceptions for people who have been pardoned.