Ralph Spicer indecently raped and assaulted a teenage girl after befriending her in Folkestone.
His victim contacted Kent Police later in his life and, following an investigation, Spicer was charged in November 2019.
After a trial at Canterbury Crown Court, Spicer was convicted of one count of rape and three counts of indecent assault.
The 55-year-old, previously from Clarendon Street, Dover, was jailed for 11 years in the same court on September 2, 2021.
The victim approached Kent Police in 2017 and recounted how she got to know Spicer when she was under 15 in Folkestone in the 1990s.
She told the police that he made her believe he loved her and raped her at her then home and sexually acted on her in his car.
Investigations by the Kent Police Vulnerability Investigation Team corroborated details of the victim’s testimony along with others who knew the victim and Spicer at the time.
PC investigating officer Kelly Merrington said: “Spicer abused this victim physically and psychologically while she was still a child and her offenses had a long-term impact on her.
“When confronted with his crimes, he continued to deny wrongdoing, further fueling the victim’s pain by forcing her to participate in a trial.
“I want to praise his courage to come forward and support this lawsuit and I hope the prison sentence imposed makes him feel that justice has now been served.
“I would also like to urge anyone else who has been or is in the process of reporting it to the police as soon as possible, so that we can take action to protect them and bring any perpetrators to court.”