Suffolk Police paid tribute to the victim and his family following the sentencing of 61-year-old Robin Croft.
Croft, who's from Marigold Drive in Red Lodge, was found guilty at Ipswich Crown Court in December of five offences of sexual activity with a child and six offences of causing or inciting a child to engage in sexual activity.
He was found not guilty of one count of sexual activity with a child, and another charge of the same offence was left on file.
Appearing at the same court on Wednesday 8th January, Croft was jailed for 12 years and ordered to sign the sex offenders' registry indefinitely.
After the sentencing, Detective Constable Bev Culloden said: "These were horrific offences against a young vulnerable boy who was groomed and sexually assaulted by Croft.
"He abused his trust to carry out these multiple offences and no child should be subjected to such abuse.
"I would also like to pay tribute to the victim who had the courage to come forward and his family for their help in supporting the investigation and hope that the court result will bring some kind of closure and allow them to move forward positively in their lives."