In May 2011, his case was put on hold as he was deemed unfit to stand trial.
After his arrest in 2009, his defence lawyers claimed that he was insane and therefore unfit to stand trial.
Two brothers behind decades of abuse and deemed unfit to stand trial, caused uproar when they returned to Donagh.
France, Switzerland, Belgium and Spain lodge last-minute challenges to the medical report which declares the general unfit to stand trial.
James and Owen-Roe McDermott were allowed to return home in June after they were declared mentally unfit to stand trial.
In June, James and Owen Roe McDermott were judged mentally unfit to stand trial and returned to live in Donagh.
Peter Thurgarland, 72, who was ruled unfit to stand trial, had admitted killing his wife Julia at their farm in Maplebeck, Nottinghamshire.
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The jury heard Mr Lesley's father Thomas Richard Lesley, 55, also from Belfast, was unfit to stand trial due to ill health.
James and Owen McDermott were deemed unfit to stand trial, while Peter Paul McDermott hanged himself at the start of his trial.
Manslaughter charges against Imco and its managing director Michael Lewis were stayed earlier this year after Mr Lewis was judged unfit to stand trial.
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The only other man to be prosecuted under the British War Crimes Act, Szymon Serafinowicz, 86, died in August 1997, six months after a court ruled he was unfit to stand trial.
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But Dr Jan Vermeulen, one of the medical experts appointed by Mr McKinnon's advisers, asserted for the first time that he was unfit to plead and stand trial.
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