Jacob Blake, 29 years old, was left paralyzed from waist down following the shooting in Kenosha, Wisconsin, and is treated in hospital.
The new claim came from the Kenosha Police Union which offered the most detailed account to date, from a police perspective, of the moments leading up to the shooting.
The incident last Sunday led to peaceful protests and also violent demonstrations, including the fatal shot of two people in the American city on Tuesday.
Ben Crump, a lawyer for the Blake family, has called for the arrest of Rusten Sheskey – the officer who shot Mr. Blake – and the two other officers involved in the shooting, Vincent Arenas and Brittany Meronek, to be sacked .
All three officers have now been placed on administrative leave.
Mr Crump claimed Mr Blake was only trying to break up a domestic dispute and did nothing to provoke the police, saying witnesses did not see him with a knife.
Cell phone footage, filmed by Raysean White, showed Mr. Sheskey and another officer following Mr. Blake with their guns as he walked past a parked SUV. Mr. Blake’s three children were in the back.
The police were sent there following a complaint from a caller on the phone that Mr. Blake was attempting to steal their keys and vehicle, said Brendan Matthews, attorney for the Kenosha Professional Police Association.
Mr Blake was armed with a knife, but officers did not see him initially, Mr Matthews said.
Officers first saw him holding the knife while on the passenger side of the vehicle, he added.
Mr White said he saw Mr Blake fight with three officers and heard them yell “drop the knife, drop the knife” before there was any gunfire. He said he had not seen a knife in Mr. Blake’s hands.
Investigators said officers saw a knife on the floor of the car. They did not say if Mr. Blake threatened anyone.
Officers asked Mr Blake to drop the knife on several occasions but he did not cooperate, Mr Matthews said, adding that the officers had tasered Mr Blake, but it did not get him. not neutralized.
Mr Blake fought forcefully with the officers, including putting one of the officers in a headache, Mr Matthews said. A second stun from a Taser didn’t stop him either, he added.
As Mr. Blake opened the driver’s door of the SUV, Mr. Sheskey put on Mr. Blake’s shirt and then opened fire.
Officers fired their guns because of the inability to achieve compliance and control after using verbal, physical and less lethal means, Matthews said.