The mother of a man shot dead by police says she will hire an expert to conduct further forensic examinations because she isn't satisfied with an investigation into his death.

A police report, released on Monday, concluded the police officer was justified in firing 14 shots at Lachan Kelly-Tumarae, 19, at Fernhill, south of Napier, last March.

The shots were fired at Mr Kelly-Tumarae after he stepped out of a car pointing a 12-gauge shotgun at police while wearing a full cartridge belt slung across his chest, Superintendent Andy Lovelock said in the report.

It took the officer 26 seconds to fire the 14 shots of which four hit Mr Kelly-Tumarae.

He was shot in the abdomen, thigh, right leg and fragments from a bullet hit his foot.

Mr Kelly-Tumarae's mother, Mereheni Tumarae, told the Dominion Post the family met with police on Monday, but she wasn't satisfied with the investigation's findings.

She said she doesn't believe the police version of events and still questioned whether her son was armed when he was shot.

"They've concocted things to suit their position. Anything can be changed or manipulated."

Ms Tumarae said she thought her son had been shot more times and was intending to hire a forensic specialist to see if that could be verified.

Supt Lovelock said the situation unfolded "very quickly" and one of the reasons why the officer fired so many shots was because he initially fired too low.

The officer continued to fire because, despite warnings, Mr Kelly-Tumarae continued to threaten police including pointing his gun at officers at point blank range.

Four police officers confirmed they saw him with the shotgun, pointing it at their colleagues.

Mr Kelly-Tumarae died in Hawke's Bay Hospital from his wounds.

The death has been referred to the coroner and is also the subject of an Independent Police Conduct Authority investigation.