The fiancé of Justine Ruszczyk Damond has spoken out against former police officer Mohamed Noor after the cop was found guilty of third-degree murder.

Don Damond told reporters on Tuesday that Justine's death exemplified a 'complete disregard for the sanctity of life.'

The Australian-American woman, 40, was gunned down outside her Minneapolis home after she called 911 to report a possible sexual assault behind her house in 2017.

'Nearly two years ago my fiance, Justine Damond Ruszczyk, was shot dead in her pyjamas outside our home without warning as she walked up to a police car which she had summoned,' Mr Damond said.

'Ironically, the Minneapolis Police Department emblem on the squad door reads: "To protect with courage and to serve with compassion".

'Where were these values that night? That night there was a tragic lapse of care and complete disregard for the sanctity of life. The evidence in this case clearly showed an egregious failure of the Minneapolis Police Department.'

Noor was charged with second-degree murder, third-degree murder, and second-degree manslaughter in the 2017 death of Damond, a dual citizen of the U.S. and Australia.

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Former Minneapolis police officer Mohamed Noor has been found guilty of third-degree murder and manslaughter. He is pictured above arriving in court today

Yoga teacher and life coach Justine Damond (pictured), 40, was shot dead in a dark alley where she had called police to report a possible sexual assault on the night of July 15, 2017

Don Damond told reporters on Tuesday that Justine's death exemplified a 'complete disregard for the sanctity of life'

A jury of ten men and two women reached a verdict on Tuesday after three weeks of testimony. The jurors were sequestered and deliberated for 11 hours.

Noor, 33, was found guilty of third-degree murder and second-degree manslaughter, and was acquitted on the highest charge, second-degree murder.

THIRD-DEGREE MURDER CHARGE Third-degree murder is also known as 'depraved-heart murder,' meaning the act was committed without intent to effect death, but caused by acting dangerously and without regard for human life. Second-degree murder means the murder was intentional but was not premeditated. Noor was acquitted on the second-degree murder charge. Second-degree manslaughter occurs when a person causes death through negligence. Advertisement

He was immediately led out of the courtroom in handcuffs. He is scheduled to be sentenced on June 7 and could face up to 25 years in prison.

The former cop showed no reaction, but his wife cried as the jury's verdict was read at his trial.

During a press conference, Damond's father, John Ruszczyk, described the process as a 'painful journey' but said he was 'satisfied with the outcome'.

Noor's attorney asked that he be released on bond pending sentencing, but prosecutors opposed that on the grounds of the seriousness of the case.

The Hennepin County Sheriff's Office said it had concerns about Noor's safety if he was free.

The verdict is believed to mark the first time a Minnesota police officer is convicted on a murder charge for shooting someone while on-duty.

Damond, 40, was shot on July 15, 2017, shortly after she called 911 to report a possible sexual assault behind her home.

Noor fired at Damond from the passenger seat of the police cruiser he was in with his partner, Matthew Harrity, when she emerged from her home.

The victim, a yoga instructor, had approached the cruiser after calling 911 twice to report a possible rape in the dark alley behind her home. No such assault was ever found to have occurred.

In court, prosecutor Amy Sweasy said Noor violated Minneapolis police training policies - and endangered the life of his partner and a teenage cyclist also present.

Justine Damond's father John Ruszczyk (right) heads into the Hennepin County Government Center in Minneapolis on Tuesday

Ms Damond, a dual US-Australian citizen was to due be married to her fiancée (pictured) a month after her life was cut short

She dismissed speculation that Damond contributed to her own death.

'He pulled (the gun). He pointed, he aimed, and he killed her,' Ms. Sweasy said. 'This is no accident. This is intentional murder,' she said.

Noor had testified that he believed there was an imminent threat after he saw a cyclist stop near the police cruiser, heard a loud bang and saw Harrity's 'reaction to the person on the driver's side raising her right arm.'

Noor added that when he reached from the cruiser's passenger seat and shot Damond through the driver's side window, it was because he thought his partner 'would have been killed.'

He said that after Damond approached the cruiser, his partner screamed, 'Oh, Jesus!' and began fumbling to unholster his gun.

Then, Noor said he saw a blonde woman wearing a pink T-shirt raising her right arm at the driver's window, identified her as a threat and fired.

A courtroom sketch depicts former Minneapolis police officer Mohamed Noor on the witness stand Thursday, April 25. Noor had testified he shot Damond after he heard a bang on his squad car, saw his partner was scared, then saw Damond at his partner's window, raising her arm

Damond, who was originally from Sydney, had called 911 to report a possible sexual assault behind her home in July 2017. Prosecutors argued her death is not a justifiable accident

The prosecutor, however, suggested that the officers should not have been surprised by a woman walking to their car, given that the 911 caller reporting the possible sexual assault was a woman.

Ms Damond, a dual US-Australian citizen was to due be married to her fiancée a month after her life was cut short.

Her death sparked anger and disbelief in the U.S. and Australia, cost the city's police chief her job and contributed to the mayor's electoral defeat a few months later.

Neither officer had their body cameras running when Ms Damond was shot, something Officer Harrity blamed on what he called a vague policy that didn't require it.