An Oxford historian has been found stabbed to death in what police say was a "vicious and sustained attack".
Adrian Greenwood was found by his cleaner in the hallway of his four-storey home on Iffley Road at around 3pm on Thursday.
The 42-year-old was pronounced dead at the scene, with a post-mortem examination saying he died from multiple stab wounds to the chest and neck.
Thames Valley Police say that formal identification is yet to take place but they are satisfied that the man was Mr Greenwood, who was also a biographer, author and a dealer of art, cars and historical artefacts.
Mr Greenwood was educated at Tonbridge School in Kent before heading to Christchurch College, Oxford, where he was a graduate of politics, philosophy and economics.
His most recent book - Through Spain With Wellington - was launched in March.
A 26-year-old man has been arrested on suspicion of his murder and is in police custody.
Detectives are still looking for the weapon used in the killing.
Mr Greenwood at Sainsbury's - the last known sighting before his death
Detective Superintendent Chris Ward, head of the Thames Valley Police Major Crime Unit, said: "We believe that an altercation has taken place in the hallway of this house.
"The post-mortem confirmed that Mr Greenwood died following a vicious and sustained attack."
He said police are keeping an open mind about the motive for the killing and would like to hear from anyone with information.
They would also like to hear from anyone who saw Mr Greenwood after 6pm on Tuesday, 5 April, when he was last seen alive at Sainsbury's in Oxford Road, Kidlington, at about 6pm.