Boy's 'campaign of rape' against nine-year-old sister Published duration 24 April 2014

image caption The boy was sentenced at Lincoln Crown Court

A teenage boy who carried out a "campaign of rape" against his younger sister has been given a 10-year custodial sentence.

The boy was 13 and his sister was nine when he began attacking her between 2008 and 2011.

He raped her more than 50 times and made threats to stop her telling people, Lincoln Crown Court heard.

The attacks ended when the boy, now 18 and from South Lincolnshire, formed a sexual relationship with another girl.

'Mental anguish'

Sentencing the teenager to 10 years in a young offenders' institution, Recorder Gareth Evans QC told him: "This was akin to a campaign of rape.

"You caused her physical and mental anguish which must have been obvious.

"Her innocence was taken away in the very place she should have found safe - her home."

A jury found him guilty of six charges of rape.

Recorder Evans said he would have imposed a 20-year sentence for similar offences committed by an adult.

"You callously used her for your own selfish needs," he said.

"You made threats to her designed to stop her from telling people what was going on. That was sufficient to keep her quiet for a very long time.