LEWISTON, Maine (AP) 鈥 A history of mental illness. An array of weapons. Law enforcement knew about his potential for violence. But he was still able to own guns and commit the deadliest mass shooting in Maine鈥檚 history.

One week later, many in Lewiston and nationwide are asking: Why did he have guns at all?

Robert Card was identified by authorities as a person of interest four hours after he shot and killed 18 people and wounded 13 others at a bowling alley and a bar in Maine鈥檚 second-largest city. But Card, who was two days after his rampage, had been well known to law enforcement .

鈥淭his is the clearest-cut case I鈥檝e seen where an extreme risk protection order could have saved all these lives,鈥 said Mark Collins, federal policy director at the gun-violence prevention group Brady, referring to measures often called 鈥 , which Maine does not have.

鈥淭his guy did everything short of taking out a front-page ad in the newspaper saying he was going to commit an atrocity,鈥 Collins said.

The intensifying scrutiny over Card鈥檚 access to firearms underscores the difficulty in seizing guns from potentially dangerous people with mental illness 鈥 especially when , as was the case with Card.

The U.S. Army reservist spent time in a psychiatric facility in New York this summer and he reportedly blamed fellow military officials for his hospitalization, according to a letter an unidentified member of the unit wrote to a Maine sheriff鈥檚 deputy.

It鈥檚 unclear when the letter was sent, but the writer describes getting a call from a friend of Card鈥檚 who was concerned Card was 鈥済oing to snap and commit a mass shooting.鈥 The letter was included in the deputy鈥檚 Sept. 15 report about efforts to contact Card.

Card threatened to shoot up the Army reserve drill center in Saco, Maine, and other places, and said that he was going to get 鈥渢hem.鈥

鈥淪ince the commander and I are the ones who had him committed we are the 鈥榯hem,鈥欌 wrote the unidentified letter writer. 鈥淗e also said I was the reason he can鈥檛 buy guns anymore because of the commitment.鈥

Authorities at the state and federal level have not said that Card鈥檚 history of mental illness should have triggered laws that kept him from owning guns. There was nothing on Card鈥檚 record before the shooting that would have kept him from passing a federal background check to buy a gun, the Bureau of Alcohol, Tobacco, Firearms and Explosives said in a statement.

Involuntary commitments are reported to federal authorities differently from state to state, said Collins.

Generally, though, not everyone who gets mental health treatment at a facility is considered involuntarily committed. That鈥檚 a determination legally made by a court or a board, which then communicates it to another state body tasked with sending that information to the federal background-check system maintained by the FBI.

Each state has an agency that should report it, but it鈥檚 not legally required everywhere, he said. Maine does require the State Bureau of Identification to report commitments to the FBI database.

Facts about the shooting 鈥 and the police response 鈥 will be determined by an independent commission, Democratic Gov. Janet Mills said Wednesday, adding she wants to know 鈥渨hat more could have been done to prevent this tragedy from occurring.鈥

Concern about Card鈥檚 behavior accelerated following an altercation he had with fellow Army Reserve members. Card and other members of the Army Reserve鈥檚 3rd Battalion, 304th Infantry Unit were in New York for training on July 15 when he accused several of them of calling him a pedophile, shoved one of them and locked himself in his motel room. The next morning, he told another soldier that he wanted people to stop talking about him.

鈥淚 told him no one was talking about him and everyone here was his friend. Card told me to leave him alone and tried to slam the door in my face,鈥 the soldier later told Maine authorities, according to documents released by the sheriff鈥檚 office.

New York State Police responded and helped bring Card to a hospital at the U.S. Military Academy in West Point for an evaluation. Card spent 14 days at the Four Winds Psychiatric Hospital in Katonah, New York, which is a few miles (kilometers) from West Point.

Jonathan Crisp, an army lawyer for two decades before starting a criminal defense practice, said when soldiers are committed involuntarily to mental health facilities by others in the chain of command, it is a 鈥渞eportable鈥 event under Army regulations that triggers a requirement to alert others, including the FBI.

鈥淚f they took him and he didn鈥檛 want to go and he refused to be admitted, it鈥檚 a slam dunk,鈥 Crisp said. 鈥淭his should have been reported.鈥

Questions over military protocols that should've been enacted with Card are similar to those raised after a during Sunday services at a church in Sutherland Springs, Texas. More than two dozen people 鈥 including eight children 鈥 were shot and killed by a gunman who had served in the Air Force before the attack and had once escaped a mental health center.

After Card left the psychiatric facility in early August, the Army directed that while on duty, he shouldn鈥檛 be allowed to have a weapon, handle ammunition or participate in live-fire activity. It also declared him to be non-deployable.

Military experts say that even if Card鈥檚 commanders determined he shouldn鈥檛 be around weapons after being committed, they would have had only a handful of options to implement, such as prohibiting him from handling weapons while on duty or attempting to sever him from the Army Reserves. There鈥檚 little they can do when the citizen-soldiers are back in civilian life.

Several weeks after his release from the hospital, on Sept. 15, a deputy was sent to visit Card鈥檚 home in Bowdoin, about 10 miles (16 kilometers) southeast of Lewiston, for a wellness check. A deputy went to Card鈥檚 trailer but couldn鈥檛 find him.

The sheriff鈥檚 office then sent out a statewide alert seeking help locating Card. It included a warning that he was known to be 鈥渁rmed and dangerous鈥 and that officers should use extreme caution.

On Sept. 16, the same deputy and another one returned to Card鈥檚 trailer. Card鈥檚 car was there and the deputy said he could hear him moving around the trailer, but no one answered the door, according to the deputy鈥檚 report.

Deputies didn鈥檛 have legal authority to press the case if Card didn鈥檛 want to open the door, Sagadahoc County Sheriff Joel Merry said Wednesday .

On Oct. 18, the sheriff鈥檚 office canceled a statewide alert seeking help locating Card.

A week later, shortly before 7 p.m. on Oct. 25, authorities about a gunman at the Just-In-Time Recreation bowling alley in Lewiston.

___

Condon reported from New York, Whitehurst from Washington, D.C., and Kruesi from Nashville. Associated Press writers David Sharp, Jake Bleiberg, Robert F. Bukaty, David R. Martin and Matt Rourke in Lewiston, Maine, and Michael Casey in Boston contributed to this report.

The 春色直播 Press. All rights reserved.