But once behind bars, the high school dropout, who was known to follow radical cleric Anjem Choudary and suspected of planning to create a terror training camp on family land in Kashmir, wrote a letter claiming he was reformed, and requested a de-radicalization class.

“I would like to do such a course so I can prove to the authorities, my family and soicity [sic] in general that I don’t carry the views I had before my arrest and also I can prove that at the time I was immature,” he wrote in October 2012. “And now I am much more mature and want to live my life as a good Muslim and also a good citizen of Britain.”

Khan hoodwinked authorities again in 2013, The Times of London wrote, when he won an appeal of his indeterminate sentence and was granted a 16-year term, allowing his early parole.

And Khan is not unique. As many as 70 terrorists have been released from Britain’s jails, the Telegraph reported.