They returned on Thursday with bomb-sniffing dogs. The animals are being used in an effort to detect gunpowder residue at the scene as the investigation continues.
The death of 52-year-old Barry Groh, of Park Avenue in Quakertown, was ruled a homicide back on Tuesday.
Groh was struck by a bullet from a high-powered rifle, the coroner said. It is illegal to hunt with high-powered rifles in Bucks County.
Groh was shot from up to 300 yards away.
The shooting happened on Monday, the first day hunters can use firearms to hunt deer in Pennsylvania.
The circumstances surrounding this death remain under investigation. Sources tell Action News that investigators are following several leads in the case.
While Groh's death has been determined to be homicide, police say there is still a possibility that this was an accident. He was not wearing an orange vest at this time he was gunned down.
According to investigators, Groh killed a 175 pound nine-point deer then dragged it almost 300 yards to a spot near Tohickon creek.
He called his wife of 25 years, Theresa, to get their son to help carry the buck. However, by the time his 19-year-old son Justin arrived, Groh had been shot.