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An accused sleeper agent for al-Qaeda’s terror network who Canada has been trying to deport for 24 years won another reprieve Thursday when a Federal Court judge granted him a new review instead of deportation.

Mohamed Harkat, an Algerian citizen, came to Canada in 1995 claiming refugee protection, but in the wake of the 9/11 terror attacks on the United States the former pizza delivery driver and gas station attendant was accused of being a sleeper agent in Osama bin Laden’s global network.

His arrest in 2002 sparked an enormous legal fight that has been running up and down in Canada’s highest courts ever since.

On Thursday, Federal Court Justice John Norris said that Ottawa’s latest effort to remove him was unreasonable. He sent the decision to be reassessed and redetermined by a different decision maker.

Harkat was formally granted refugee protection in 1997. Five years later, Canada issued a security certificate against him under new laws enacted amid heightened attention and concern of Islamic terrorism after the Sept. 11, 2001, attacks.

Harkat, now 57, has denied the allegations.

Ottawa used a security certificate to declare him inadmissible to Canada as a security threat, which was supposed to speed his removal from the country. It didn’t. The certificate was argued in court and upheld in 2005, but the security certificate system had to be reworked after a constitutional challenge.

In 2008, after amendments to the law, a second security certificate was issued against him. This one declared him inadmissible to Canada on security grounds for engaging in terrorism, being a danger to the security of Canada, and being a member of the Bin Laden network, an organization engaged in acts of terrorism.

This second certificate also had to be accessed by the Federal Court, which Justice Simon Noël did in 2010, ruling it was reasonable.

Noël found in his 2010 decision that while Harkat had been involved in the Islamist extremist movement before and after coming to Canada, there was no evidence he personally engaged in violent acts in Canada or elsewhere.

Harkat’s role, Noël said, “would have been largely one of logistics and facilitation.” Before Harkat came to Canada he ran a guest house in Peshawar, Pakistan, for a known extremist, where he helped move mujahideen to and from training camps and ran errands, court heard. The groups involved, Noël found, had material and ideological links to bin Laden, meaning they were part of the Bin Laden Network — making Harkat part of it as well.

Noël also found that while Harkat’s activities constituted a danger to the security of Canada, that danger has lessened by the passage of time, his public exposure as a target of a security investigation, by his previous detention, by his current release on stringent conditions, and by severing his past ties.