Usman Khan murdered two people and injured at least three more in the attack on London Bridge on Friday. But he was not unknown to police.
In 2012, Khan became a convicted terrorist for his role in the Stock Exchange plot, a planned scheme for a Christmas bomb attack on the London Stock Exchange, the American embassy and the home of Boris Johnson, who was then the Mayor of London.
At the time of his sentencing, the judge warned that he was a "serious jihadist" who should not be released while he remained a threat to the public.
In February 2012, he was convicted for terrorism offences and released from prison in December 2018 on licence, the Metropolitan Police said.
He had been ordered to serve at least eight years in prison over his part in a plot to bomb the London Stock Exchange and build a terrorist training camp on land in Pakistan-controlled Kashmir owned by his family.
The Stoke-on-Trent-based radical, along with two co-conspirators, originally received an indeterminate sentence for public protection but this was quashed at the Court of Appeal in April 2013 and he was given a determinate 16-year jail term.
But police confirmed last night that Khan, 28, from Staffordshire, had been freed from prison on an electronic tag.
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