A violent assault took place at the home of an international pool player who has not been seen for a week, police in Lancashire have said.
Police say Mr Guilfoyle's disappearance is out of character
David Guilfoyle, 37, was last seen leaving the Grey Horse pub on Whalley Road, Accrington, last Wednesday night.
The businessman, who lives in Royds Avenue in the town, left the pub in a jubilant mood after watching the Champions League final with friends.
Forensic experts who examined his home said someone had been attacked there.
Officers carried out a detailed scientific search of the bungalow after becoming concerned for his welfare.
Mr Guilfoyle has represented England in pool tournaments worldwide. Police say he had been driving his distinctive green convertible Jaguar XK8 sports car on the night he disappeared.
Det Supt Mick Turner said: "I am gravely concerned for the welfare of David Guilfoyle as we have yet to receive any further sightings of him since he left the Grey Horse pub last week.
"This coupled with what we have found at this home address leads us to believe that he may have come to serious harm.
"It does appear that he did arrive home at some point on Wednesday night and his car was parked and secured on the driveway of his home.
"Since Wednesday night though, there has been no further contact with him, which according to friends is most unusual. We are appealing for anyone with any information to contact the police immediately."