Bohrer did not know Pannuty's age but said he lived in Sportsmen's Paradise, a community along the Potomac River in northern Berkeley County.
The shooting happened at Pannuty's home at around 11:45 p.m. When deputies arrived, they said they found Pannuty on the kitchen floor with a single gunshot wound to the left side of his head, according to a press release from the sheriff's department.
Pannuty's girlfriend told police that a group of men entered the home and pushed Pannuty to the ground before firing one shot at him. Bohrer said police were not sure what caliber of gun was used.
A search warrant was served on a home in Hagerstown, from which police seized a vehicle and other evidence connected to the shooting, Bohrer said. Although police have a suspect, no arrests had been made, Bohrer said.
Bohrer said Pannuty and his girlfriend were providing police with only "minimal details."
Sgt. Russell Shackelford, who was leading the investigation, was not available Monday night.
The shooting remained under investigation.