A man described as a monster by his victim has been jailed, 31 years after kidnapping and sexually assaulting her.
The victim, then aged nine, was out riding her bicycle in Hull in 1979 when David Littlewood attacked her and threatened her with a knife.
The 56-year-old, of Spring Bank West, Hull, was jailed for 10 years after admitting kidnap and assault and a number of other offences.
The victim said: "He's not a human being... he's a monster."
Humberside Police said the victim had been riding her bicycle along the footpath near to Ennerdale and the River Hull, where she was going to feed the horses.
Littlewood, who was wearing plastic bags on his hands, stepped out in front and removed her from her bicycle.
He threatened her with a knife, told her he would kill her and took her into a grassed area where he indecently assaulted her.
The incident was subject to a large police investigation but the attacker was never found.
The case was reopened by the Humberside Police major incident team after a review of historical sexual offences.
Advances in forensic science meant officers were able to obtain a DNA profile from material and matched it to Littlewood, who was arrested last September.
Police searched his property and seized more than 2,000 indecent images of children on his computer as well as a home-made video clip involving two naked children.
Det Supt Dena Fleming said: "The victim was a child at the time this happened to her.
"I cannot imagine the fear she must have felt being confronted by a man with a knife, wearing bags on his hands and threatening to kill her.
"He took away her childhood, gave her fears no one should have to experience and ruined her adult life as well."
Ms Fleming added: "This horrendous attack on a small child happened in 1979.
"The video clip that was made by Littlewood can be dated at some time in the 1990s and the images on his computer show current activity.
"All of that adds up to the fact that Littlewood had an interest in children all of his adult life."