Ex-American football star OJ Simpson has been questioned by police in Las Vegas in connection with an alleged armed robbery at a casino hotel room.
OJ Simpson was found not guilty in 1995 of his ex-wife's murder
The incident occurred at the Palace Station Casino late on Thursday.
Police said they were questioning Mr Simpson and four others over an alleged theft that involved sports memorabilia.
Mr Simpson is reported to have tried to retrieve the items which he claimed belonged to him. Police said he had not been arrested but was "co-operating".
Police were called to the hotel room after a man thought to be a memorabilia dealer reported being robbed by five people, one of whom he said was OJ Simpson.
Police captain James Dillon said: "We have a report from the victim that there were weapons involved. We have not determined that at this time and have not recovered any weapons."
"The items taken were various sports-related products," he said.
Detectives were arranging to interview Mr Simpson again, Capt Dillon said, adding that police were studying video surveillance tapes from the casino.
"There was no hesitation on his part to co-operate, and to immediately meet with police and that is ongoing at this time," he said.
Mr Simpson was tried and acquitted in 1995 of murdering his ex-wife Nicole Brown Simpson and her friend Ronald Goldman on 12 June 1994.
Mr Simpson was later found liable for the deaths in a civil trial and ordered to pay $33.5m (£17m) in damages - money that has never been collected.
In July, the rights to Mr Simpson's book If I Did It were awarded to Mr Goldman's family to help cover the judgement.
The book, in which Mr Simpson describes how he would have killed his ex-wife and her friend, was published in the US on Thursday by Beaufort Books.
The publication followed months of legal wrangling after Rupert Murdoch's companies cancelled plans to publish the book following a public outcry last year.