WATCH: Inside Police 'Active Shooter' Tactical Operation

BRANFORD, CT — In less than two minutes after the first 911 call came in reporting shots-fired, Branford police were on the scene outside 241 Main St., where Matthew Walker, 38, was holed up firing a rifle and other guns out his second floor apartment window.

One of those shots fired struck a citizen, Ashwin Patel, 65, who was outside his and his family's liquor store three doors down from 241 Main St., where Walker lived. Patel suffered a non-life threatening gunshot wound.

Walker killed himself, police said.

For the next near six hours, Branford officers were in a standoff with the 38-year-old who they later found had an arsenal of firearms. They were very quickly joined by two East Haven police officers who positioned themselves feet away from the gunfight, as well as the regional SWAT team.

Branford police have released body camera footage of the active shooter scene. In still images provided to Patch, officers can be seen on the ground outside the apartment as Walker, from his second floor perch, fires repeatedly.

Some of the video footage is from the bodycam worn by Branford police officer Jeff Couto, a former Connecticut State Trooper.

In one video, Branford Police Department Capt. Greg Watrous is seen and heard running the tactical operation; communicating with other officers as they wait for an armored vehicle to arrive.

During the standoff, Walker fires a number of times, with a number of different guns, police said.

Branford Police Chief Jon Mulhern said the work officers did that day was at once professional, highly-skilled and calm in the face of a "critical" incident.

Watrous told Patch that while he was just doing his job, he commended fellow officers for their professional —and life-saving —decision-making and communication.

Watrous said his initial and primary concern was for officers' positions around the scene.

"We were in a compromised position," he said. "My concern was officers that weer in more dangerous positions then where we were. There were unknowns. Communication was key and (having) each others backs." Watrous said he was "tremendously proud" of the work done that day to keep the community safe.

"It's one of those things you train for but hope will never happen," he said.

Two officers, from the East Haven Police Department who responded to a police request for mutual aid, in particular were in a precarious position.

Branford Police Deputy Chief John Alves noted that the East Haven officers, who were located at the corner by Pepe's service station, "Were instrumental in securing the perimeter of the Walker’s residence and assisted in removing the shooting victim from Pepe’s garage to safety."

Police describe the standoff and gunfight where in the span of around 25 minutes, Walker fired repeatedly out of smashed out, and cardboard-covered, windows. With officers on the ground and under cover nearby, rapid-fire shots are heard. Communication between officers sharing vital information, all while never having a clear view of Walker: "If anyone comes out that front door, our position is compromised!"

The day after the shootout, Patch spoke to a neighbor who said police used his house to try and get a better view and vantage point in which to return fire, if necessary. Police did return fire and that's why the New Haven State's Attorney was later called to the scene, Mulhern said.

"We're taking fire here," one officer yells. "We're taking rounds. He's coming right for us," another says.

Ultimately, no officers were physically injured and Walker took his own life, police determined when, after an hour-long lull, there was silence coming from the house and a drone was sent in.

Mulhern and Alves both told Patch that while the incident was one officers are still coming to grips with, they were "professional throughout."

Alves said that officers later learned that in recent weeks, Walker had been "acquiring multiple weapons." He also said that Walker had "stopped taking medications prescribed for mental health and showed signs that he may have been experiencing paranoia."

Caution: Images and information you are about to see and hear may be disturbing. In addition, there may be strong language by those seen and heard in the recordings. Viewer discretion is advised, especially for young children and sensitive viewers.

And here is audio of the 911 calls.

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