Dog the Bounty Hunter's stepson Gregory Zecca is under a criminal investigation. Tragedy struck the family on Saturday night when Gregory allegedly accidentally shot and killed his 13-year-old son, Anthony, at their Naples, Florida, home. He's since been placed on a 5150 psychiatric hold due to the immense grief of the situation and fears he could harm himself after the incident, his family confirmed to TMZ. That said, they stressed this was not due to him feeling guilty of committing a crime related to the incident. An innteresting thing to stress upon in light of the new developments...