"Rennie, 38, was the successful chief executive of LGBT Youth Scotland, an organisation dedicated to helping young gay people. A former secondary school teacher, he regularly spoke out in public on gay issues, particularly how they affected young people. He was charged and ultimately convicted of molesting a child over a number of years, starting at the age of three months. And in an online conversation with another accused, he even expressed a wish to see children with Down's Syndrome or a learning disability sexually abused. Operation Algebra officers found that Rennie had links with paedophiles in the US and...