A county scout master has been jailed for 18 years after pleading guilty to 49 child sex offences involving nine victims.
37-year-old David Sewell, of Valley Road, Grantham, pleaded guilty to the charges, including the rape of a boy under the age of 13, sexual assault of boys under the age of 13, sexual touching, voyeurism and the possession of child sex abuse images.
Lincolnshire Police's investigation into Sewell, whose youngest victim was just 10 at the time of his offending, was prompted when a local man reported historic sexual assaults to officers in July this year.
Supt Rick Hatton, Head of Lincolnshire Police's Public Protection Unit, said: "Sewell is a very dangerous predatory paedophile and his crimes have had a profound and lasting impact on several young people's lives.
"The systematic and planned grooming of these young people illustrated the calculated and manipulative offending of Sewell, who placed himself in positions where he had access to children and could gain their trust.
"We hope that Sewell's conviction helps them, in some sense, to move forward with their lives. Lincolnshire Police and our partners in Social Services will continue to offer the families involved as much support as possible."