The 91-year-old mother of a man killed on his Sussex farm has made an appeal on the BBC's Crimewatch programme.
Molly Gardner, who was asleep in the main farmhouse when her son, Julian Gardner, was killed, said: "I would say was what you gained worth a life?"
The 53-year-old died from multiple injuries after apparently disturbing thieves in outbuildings.
Eight people have been arrested after the discovery of the businessman's body on 11 October.
Senior Investigating Officer Det Ch Insp Adam Hibbert from Sussex Police said that there were more arrests to come.
He said: "We are now two months into this complex investigation, and have a clearer picture of what may have happened the night of Julian's death."
Police have already arrested and bailed seven men, six from Kent and one from north Wales, and a woman from Kent.
Mr Gardner's body was found at Bush Barn Farm, off the A21 north of Robertsbridge, by his business partner. He had suffered several fractures and compression injuries.
One theory is that he was crushed between two vehicles.
A Landrover Defender, which belonged to Mr Gardner, was found burnt out at Cripps Corner, the day his body was found. It had been taken in the early hours of 11 October.
A Cherokee Jeep, which may have been used in the raid, was found burnt out at Sandhurst also on 11 October.
A dark blue Subaru Legacy car, registration P304 MOO, was recovered by detectives from the car park of the Crusade public house in Ashford. Police are keen to trace the car's movements immediately before and after the murder.
"If you think for a moment and realise it probably wasn't (worth a life) then come forward and say what you did and take your punishment and I would think a lot of you," Mrs Gardner said in her appeal.