Vince Li was declared not criminally responsible last year for the killing of Tim McLean on a Greyhound bus in 2008. (John Woods/Canadian Press)

Manitoba's main opposition party is calling on the government to transfer Vince Li to a fenced-in facility outside the province.

Li, 41, was found not criminally responsible last year for stabbing and beheading fellow passenger Tim McLean on a Greyhound bus in 2008.

He was in a Winnipeg courtroom Monday for a mandatory annual review of his detention at a mental-health facility in Selkirk, north of Winnipeg.

At the hearing, Li's doctors asked the board to consider allowing Li 15-minute escorted walks on the grounds of the Selkirk Mental Health Centre.

He's currently being held in a secure part of the facility. The Crown and McLean's family are opposed to the move.

Progressive Conservative Leader Hugh McFadyen is also opposed to giving Li more freedom to move because the area where the walks would take place is not fenced in.

He wants the government to send Li to a hospital in another province where he would remain fenced-in when outdoors.

"We are asking for a policy to be put in place that somebody who's committed such an incredibly terrible violent act such a short time ago would not be in a position that they are able to get into the community with relative ease," he told CBC News.

Attorney General Andrew Swan rejected that idea because decisions about Li's custody and similar cases are made by the Criminal Code Review Board — an independent body that operates under federal guidelines — not the province.

With files from The Canadian Press