LISLE, Ill. (CBS) — A witness provided a firsthand account Sunday of a shooting in wet suburban Lisle that left a former state trooper dead, as well as the woman who wielded the gun.

Two other victims with law enforcement backgrounds were recovering Sunday night.

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CBS 2’s Steven Graves spoke with a man who recalls chilling details from the Friday night attack.

Patrick Carlin of Naperville said he was enjoying a night with friends at the Humidor Cigar Lounge in Lisle – a place he frequents often.

He vowed that he will be returning to the cigar lounge as he grappled with some sounds and sights he will never forget.

Carlin recalls a friendly atmosphere this past Friday turned into chaos.

“We were just hanging out – you know, playing pool, having some cigars – so for this to happen? I mean, we were just completely shell-shocked,” he said.

He described a calm night at the cigar lounge, when in a nearby room, he heard a noise.

“The first one sounded like a bang; like something had fallen,” Carlin said.

But a second bang came, and then another.

“And then I think after the third shot, there was screaming,” Carlin said.

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That was when he and his friends left. But they came back to hear that a woman – who police identify as Lisa McMullan, shot three people and then shot and killed herself.

Lisa McMullan

One victim – retired Illinois State Trooper Gregory Rieves, 51 – was killed when he was shot in the head.

Gregory Rieves

A current trooper, Kaiton Bullock, 48, and a retired ISP special agent, Lloyd Graham, 55, were hurt in the shooting.

“They had said that this lady Lisa shot these guys,” Carlin said. “I couldn’t believe it because I know her. Every time that I had gone to the lounge, I would say, she was there all of the time.”

Carlin said the woman always had a distinct laugh – one he couldn’t mistake that night.

He said McMullan was laughing “a half hour before this happened, yes, and that’s why I just couldn’t believe it.”

Family members said Rieves leaves behind a son.

State Police said Sunday evening that Bullock and Graham were recovering and their conditions remained stable.

Authorities said McMullan knew Reeves, but have not said how.

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On Monday, police are speaking to two surviving victims to piece the crime together.