PORTLAND -- The man who was shot and killed by a Portland police officer on March 22 had sought mental help from the bureau only 11 days earlier, according to a police report obtained by KGW.

The report, dated March 11, said that Jack Collins told the officer he had molested a girl decades earlier, when he was in high school. Collins then asked the officer if he could get mental health care.

The officer noted in the police report that he did not believe the crime actually occurred. but he directed Collins to Cascadia Mental Health for help. More:Read the Police Report

Collins was shot and killed Southwest Portland Monday after he came at a police officer with a knife, according to investigators.

On Thursday, police released a statement outlining their own review into that deadly shooting. Among other things, it said that Collins had threatened to kill a woman and her son at the Hoyt Arboretum moments earlier. Officer Jason Walters shot 58-year-old Collins a total of four times, according to the police statement, which said that investigators had completed their interview with Walters, as well as 18 witnesses.

Investigators said Walters shouted at Collins to drop his knife at least three times before he fired two shots at him. Collins continued advancing on Officer Walters and told the officer that he was not going to drop the weapon, said detective Mary Wheat, a spokeswoman for Portland police. That's when Walters fired the first two shots, Wheat said. Then, Walters saw Collins remain standing and slowly spin around with the knife still in his hand.

At that time, the statement said Walters again commanded Collins to drop the knife, but Collins instead advanced toward him. Officer Walters then fired two more shots. Collins dropped to the ground...

The police statement also said that Collins had approached a woman and her son at the arboretum and threatened to kill both of them. The woman alerted a staff member who then made the initial 9-1-1 call.

Anti-violence group calls for federal probe

Meantime, a Portland religious group critical of police violence was calling for a federal Justice Department investigation into this week's deadly police shooting of a transient in Southwest Portland. Members of the Albina Ministerial Alliance held a news conference Thursday and said among other things, they want an investigation into patterns and practices of the police bureau. They also called on city commissioners to strengthen the citizen review committee and give it more power.

More:Who is Jack Jackie Collins?

Investigators said Collins was bloody and had been harassing and threatening people at the Hoyt Arboretum with an Exacto knife.

Officer Jason Walters, a 13-year veteran, arrived at the scene at 3:24 p.m. and made contact with the man who was in the bathroom near the Hoyt Arboretum office. The man, who had significant blood on him, confronted the officer with a razor knife, Wheat said, on the day after the shooting.

More: Photos of shooting scene

Then, the officer and the subject began moving out of the bathroom area, with the subject still approaching the officer with the razor knife. At this point, the officer fired shots at the subject, Wheat said.

Raw video:Police news conference

Collins was fatally wounded and paramedics were quickly called to the scene, but he could not be revived. The officer was not injured.

Portland police officers are confronted every day with life and death decisions. I am thankful that officer Walters was able to protect the public in a place that is loved, Portland Police Chief Rosie Sizer said during a press conference late Tuesday morning.

The investigation continued into Tuesday and Wheat said police were still trying to get in touch with several witnesses who were spotted earlier at the scene. An autopsy determined that the suspect died after a bullet hit a major artery, according to Medical Examiner Dr. Karen Gunson. He had been shot four times and also had several self-inflicted cuts on his neck, which suggested that he may have been trying to kill himself, Gunson said.

There were no obvious indications of intoxication but they are doing a toxicology screen.

Dr. Gunson says the man looks like he s in his 60 s but may be younger having lived a harder life. He looked to be a transient. He also was not in the best of health, having heart and lung disease.

Walters was placed on paid leave, per procedure in these types of incidents.

Several officers were investigating, along with chain of command and Portland Police Commissioner Dan Saltzman.

Anytime there is an officer involved shooting with a fatality, it's a major concern and I felt I wanted to come here to get the facts, Saltzman said.

Portland Mayor Sam Adams added that Saltzman would likely ask that a transcript of the Grand Jury review on the shooting be released for public viewing, and he would support those efforts. Based on the details and circumstances in my briefing, this event reflects a very sad situation. However, until we have gathered all of the facts, I will reserve judgment, Adams said.

Hoyt Arboretum Executive Director released a statement Tuesday:

As a living museum we cherish life, and as such are deeply saddened at the loss of a life in the Arboretum. Visitors, volunteers, and staff of the Hoyt Arboretum remained safe and unharmed throughout the duration of events.

Shooting sets off police protest in SE Portland

The shooting has also sparked police protests. Tuesday night, protesters marched through Southeast Portland and officers said one activist threw a bicycle at a motorcycle cop.. One protester was arrested. The night before, protesters gathered and were accused of vandalism.

More: Groups protest police shooting

People in the crowd yelled cops are murderers and chanted the names of other people who have died at the hands of police, including Aaron Campbell.

More: Complete coverage of Campbell shooting

There were several dozen people in the protest crowd. They said they were regular people outraged over police violence.

Chief Sizer said she was disappointed that the protesters became unruly and vandalism occurred.

As a Portland police officer, I cherish free speech rights, Sizer said Tuesday. But I am disappointed in the way these rights were expressed last night, which results in property damage and created a potentially dangerous situation for the community.

Protesters told KGW Monday night that they felt compelled to react.

Meantime, Portland police were asking anyone who was in the area of the Hoyt Arboretum during the time of the shooting or has any information about this incident, to contact detective Mark Slater at (503) 823-9319 as the investigation continued.

The Hoyt Arboretum visitor's center is part of Washington Park, in The Hoyt Arboretum visitor's center is part of Washington Park, in Southwest Portland.

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