A third man has been arrested over the death of businessman Julian Gardner at his farm in East Sussex.
Sussex Police said a 31-year-old Kent man had been arrested in Caernarfon, North Wales, in connection with the ongoing murder investigation.
Det Ch Insp Trevor Bowles, who is leading the inquiry, said the man would be brought to Sussex and questioned.
Two other men from Ashford, Kent, have been arrested and bailed.
Mr Bowles said the man arrested in Wales shortly after midday on Thursday was being brought to Sussex within the next 24 hours.
Mr Gardner, 53, died on 11 October from multiple injuries after apparently disturbing thieves in outbuildings at his Robertsbridge farm.
Police believe he was the victim of a botched robbery at Bush Barn Farm where he ran an agricultural and car repair business.
One theory is that he was crushed between two vehicles.
Mr Gardner's body was found by his business partner. He had suffered several fractures and compression injuries.
Two burnt-out vehicles were found abandoned a few miles away.