Dog the Bounty Hunter 's step-grandson's fatal gunshot wound was in his neck ... TMZ has learned. We obtained the police report from the Collier County Sheriff's Office in Florida and deputies say 13-year-old Anthony Zecca had an entry wound on his neck, just above his sternum, and no exit wound.

Gregory Zecca, stepson of Duane 'Dog the Bounty Hunter' Chapman, is under psychiatric observation after the accidental shooting death of his 13-year-old son, Anthony, in Florida. Authorities have placed Zecca under medical supervision due to concerns about his wellbeing following the tragic incident.