CSI: Miami - Season 1 Episode 20 -

Ex-con Pete Wilton begs Horatio to use the skill that got him arrested to find his missing son Jeff. The knave is found to be a habitual marijuana user and fired over 200 bullets on the yard tree with mates Nick Gordon and Jared Hatch, calling themselves 4.20 boys. Pete forfeits his parole to cover for Jeff, but Horatio and Delko soon discover sinister indications in the boys' lockers, which turn out sadly prophetic, yet prevent an ultimate tragedy.