Port St. Lucie police said a man went outside overnight to investigate a knock on his door and was fatally shot.
At 1:06 a.m. Tuesday, police went to the 3000 block of SE Darien Rd. for reports of a gunshot.
When officers arrived, they found the victim, identified as Beau Hartman, shot in the abdomen.
Police said Hartman had arrived at the residence after a night at work. While at the house there was a knock at the front door.
One of the five occupants of the house looked out of the front window and saw a man with his face concealed at the front of the house.
Police said Hartman and another occupant went outside to investigate who was knocking on the door. As Hartman headed around the driveway, he was met by a person who shot him in the abdomen.
The gunman fled the area as police were called to the scene.
Hartman was flown to a nearby hospital where he was pronounced dead. Port St. Lucie police detectives are currently investigating.