Londonderry man Frankie McFadden was handed an 11-year prison sentence for offences including rape, indecent assault and threats to kill of Martina Johnston between 1975 and 1985.The 54-year-old from Moyola Drive began abusing Martina when she was just six and he was 16, in a family home in the Bogside area of the city.Martina told UTV she was speaking out to encourage others to lift the phone and report offences, or seek support.She said: "For 30 years I've lived with this, but at least I know he is off the streets and can't harm anybody else."I didn't know what was going on. I had no idea what was right or what was wrong, or who I should talk to."I just wanted to blank out my whole childhood."Martina said the decision to waive her lifelong right to anonymity had ripped her family apart.She added: "I did it to help others, to show that there is help out there for them."They don't need to be ashamed or embarrassed about what has happened to them, they just need to lift the phone - there is so much help out there."McFadden was handed an 11-year prison sentence with a further two years to serve on probation.Handing down sentence, Judge Philip Babington said the sexual offending was of a "very serious nature carried out only to satisfy McFadden's base instincts".He said there was a degree of planning and premeditation to his offending seen by the fact he had given Martina sweets and lollipops.Judge Babington added that he hoped the conviction and sentencing could offer Martina some form of closure.