Maine shooting: New details emerge in Robert Card's death

Dr. John Alexander, the chief medical officer of the Central Maine Medical Center, which admitted 14 victims from Wednesday's mass shooting, spoke with ABC News' Trevor Ault about the scramble his physicians made to treat the patients.

Three of the patients died and another three are in critical condition as of Thursday evening.

Alexander said although the team is trained to deal with mass casualty events, the number of casualties was a challenge for the hospital.

“It certainly is unprecedented so far as the severity of the injuries and certainly the attack on the community,” he said.

At least 30 to 40 employees who were not on shift last night were voluntarily standing by to assist fellow staffers working around the clock to care for victims, according to Alexander.

He said the hospital is providing 24-hour mental health resources for staffers in need.

-ABC News' Briana Stewart

Investigators found a note at the home of mass shooting suspect Robert Card, law enforcement sources familiar with the case told ABC News.

The sources declined to describe the contents of the note, its length or its relevance to the investigation.

Investigators recovered a gun from the abandoned car of mass shooting suspect Robert Card, multiple law enforcement sources told ABC News.

Card's white Subaru was found Wednesday night.

Authorities are testing and tracing the gun to determine if it was involved in the shooting, according to multiple law enforcement sources.

Card may have access to other firearms. Sources said law enforcement is treating him as though he is armed and dangerous.

-ABC News' Luke Barr

The shooting unfolded in part during youth night at a local bowling alley. Witnesses described a desperate scene where people hid behind benches and tables and even inside the bowling pin machine at the end of a lane.

Meghan Hutchinson, who was at the bowling alley with her daughter said, "When I turned around, I saw the shooter. ... I don't know if that was just a warning shot or if he shot somebody with that [bullet]."

"Between the lanes there's some swinging doors where they keep all the mechanical stuff out back, so we kind of all just ran that way," she said. "We barricaded in there and another parent was in the room with me. She had a phone, she called 911."

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Security measures in place for victims in hospital after Maine mass shooting

ABC News' Trevor Ault is at the Central Maine Medical Center where many of the injured in the Lewiston mass shooting are being treated.

Her daughter, 10-year-old Zoey Levesque, was grazed by a bullet.

"I never thought I'd grow up and get a bullet in my leg," she said. "Like, why do people do this? I was more worried about, like, am I going to live and going to make it out of here? Like, what's going to happen? Are the cops going to come?"