Julian Gardner was killed after he interrupted the gang of professional burglars as they ransacked property at his farm in East Sussex.
The 52-year-old was found dead by his business partner less than 100 yards from his home at Bush Barn Farm, off the A21 near Robertsbridge, several hours after the burglary on October 11, 2010.
Today at Lewes Crown Court, Judge Anthony Scott-Gall told brothers Marcus and Terrence Bristow they had been the prime movers in the burglary and jailed them for 11 years each.
Lee Delay and Christopher Leek were described as foot soldiers in the gang and were sentenced to seven years and four-and-a-half years' imprisonment respectively.
Paul Dunn was jailed for seven years, Oliver Payne for three and Terrence Dunn was sentenced to 18 months.
Four of the men - Terrence Bristow, 41, of Chart Road, Great Chart, near Ashford, Kent; Marcus Bristow, 32, of Mock Lane, Great Chart; Delay, 23, of Whitegate Close, Tunbridge Wells; and Dunn, 33, of Fryth Crescent, Cranbrook, were found guilty by majority verdicts of Mr Gardner's manslaughter yesterday following almost 22 hours' deliberation.
Terrence and Marcus Bristow, Delay, Dunn, Leek, 30, of Pear Tree Close, Cranbrook, and Oliver Payne, 25, of Sandhurst Road, Tunbridge Wells, were found guilty of conspiracy to commit burglary and conspiracy to pervert the course of justice earlier yesterday afternoon.
Dunn, 57, of Tanyards Estate, Sandhurst, Kent, was also found guilty of conspiracy to pervert the course of justice, while Payne was found not guilty of manslaughter.
The jury was unable to come to a verdict on the manslaughter charge in relation to Leek and it was formally discharged by Judge Scott-Gall.
