Military police say there's no truth to a former cultural adviser's allegations that Canadian soldiers shot and killed an unarmed Afghan teen during a raid on a home in Kandahar more than three years ago.

Former translator Ahmadshah Malgarai speaks to media after testifying at a special committee meeting on the Canadian mission in Afghanistan on Parliament Hill in Ottawa last April. (Blair Gable/Reuters) But Ahmadshah Malgarai, who served as adviser to the former Joint Task Force commander in Afghanistan from June 2007 to June 2008, said the police findings can't be trusted.

Malgarai, a Canadian citizen born in Afghanistan, had initially made the explosive allegations in April before a parliamentary committee examining transfers of prisoners from Canadian to Afghan custody.

His claims were dismissed by the military until The Canadian Press published eyewitness accounts of the June 2007 incident.

Relatives of the dead teen, named Janan, had painted a picture of a hunt for insurgents gone horribly wrong.

Malgarai told the committee that although he did not witness the alleged shooting, he was present for the interrogation of men detained by the Canadian soldiers.

The military's investigation, through the Canadian Forces National Investigation Service (CFNIS), confirmed that a raid took place but said the young man was armed and a legitimate threat and there were no criminal or service offences committed.

But Malgarai said the CFNIS probe was coloured by the fact that Gen. Walter Natynczyk, Canada's chief of defence staff, denied wrongdoing before the investigation was even launched.

The former adviser said military police tried to get him to co-operate with the investigation but he refused unless it was transferred to an outside agency.

The CFNIS said that, in reviewing the allegations, eyewitnesses to the attack were interviewed, including the boy's family.

Family members have said they told Canadian officials the same story they told everyone — that Janan was spooked by the soldiers bursting into his home and was running away.