Sutherland, who was investigated by police in Doncaster, was initially given an 18-year sentence on Thursday before the judge ordered he serve an extra seven years as he was deemed a dangerous offender.
Det Con Duncan-Blakley said the victim’s help was key to seeing her attacker jailed.
“She went through a very traumatic ordeal at a vulnerable and tender age, before bravely opening up to her family and then telling police what had happened,” she said.
“Without her testimony, Sutherland may have never been brought to justice and to add further insult, he made his victim and her relatives endure a trial in court but I am glad the jury saw through his lies and found him guilty of the offences he denied.”
In addition to the prison sentence, Sutherland, who also admitted making indecent photographs of a child, was given a 20-year restraining order against his victim.
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