As former general secretary of the Bristol RSPCA, Andrew Gibson was devoted to animal welfare. But, as a scout leader, he preyed on boys in his charge and kept that dark secret for more than four decades.
Bristol Crown Court heard that in sexual abuse which started 43 years ago, Gibson molested five boys all aged under 13. He targeted four victims when he was a scout leader and one when he was conservation warden on Lundy island.
The 84-year-old, of Trinity Place in Weston-super-Mare, denied wrongdoing. But a jury convicted him of nine charges of indecent assault and one of buggery.