Yorkshire paedophile Andrew Iveson has been jailed, with police describing his crimes as the worst examples of child abuse they have ever seen, including forcing a dog onto a female victim.
The 48 year old, of Anchorage Hill, Richmond, was sentenced at Teesside Crown Court on 17 June after being found guilty of nine child sex offences, 11 counts of rape and five other sexual offences.
He sexually assaulted a girl for eight years between 2005 and 2013, with the ordeal starting when the girl was just 10.
The court heard how Iveson, who worked as a relationship therapist, forced his dog onto the victim in one depraved act.
Following sentencing Detective Inspector Shaun Page, of North Yorkshire Police, condemned Iveson for the ordeal he had subjected his victim to.
He said: "Andrew Iveson is guilty of some of the most horrific abuse I have ever dealt with during my 19 years as a police officer.
"The ordeal he put his victim through when she should have been enjoying her childhood was downright evil and I can only describe him as a monster.
"I would like to acknowledge the bravery of the victim for coming forward and telling the police what happened to her. Her courage has ensured that a vile and dangerous paedophile has been jailed for a long period of time.
"I hope that she can now begin to rebuild her life with the knowledge that justice has been done.
"This was a sensitive and harrowing investigation and I would also commend the investigating officer in the case, DC Gillian Gowling, for her professionalism and dedication."
Iveson was also ordered to sign the sex offenders register for life.