In American Crime Story season 2, Assassination of Versace, episode 9 of The Assassination of Gianni Versace: American Crime Story, an old man receives a phone call and visits the boathouse where Andrew Cunanan has been hiding for several days. This old man notices the boathouse has been broken in and pulls out a pistol and starts searching this boathouse. Andrew fires a shot in the air to scare off this old man, who calls the police and FBI right away.
Who is this old man? What does he do?