Oxford-educated Harry Potter collector, 42, dies of stab wounds to chest and neck at his £640,000 home - as police arrest 26-year-old man

Historian Adrian Greenwood, pictured in CCTV images capturing the last sighting of him, top left, was discovered by a member of the public at his home in Oxford on Thursday and initially police
described his death as 'unexplained'. Four homes were cordoned off by forensics officers, who combed the steps outside for clues, before announcing it had become a murder investigation this afternoon. Officers confirmed they are investigating Mr Greenwood's murder and revealed the avid collector of Harry Potter first editions died of multiple stab wounds to the chest and neck. It is believed Mr Greenwood, pictured right, was attacked in the hallway of his house, shown bottom left. A 26-year-old man has been arrested on suspicion of murder and is currently in custody.