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MESA, Ariz. – A photographer captured video at a standoff over the weekend that offers a rare glimpse into the danger and unpredictable nature of these scenes.

The Maricopa County Sheriff’s Office sent a SWAT team to a home in East Mesa, where a man was accused of shooting at his girlfriend, according to KPHO.

As the officers were yelling for the suspect, Richard Winn, to surrender, three large dogs can be seen running out and attacking an MCSO K-9 named Marko.

One of the officers shot and killed one of the attacking dogs.

As the scene becomes more chaotic, the K-9 can be seen, bloodied and clearly injured, rebounding and refocusing on his handler’s commands.

“He wasn’t distracted, even after being attacked by another dog,” said Bob Solimini, who owns Delta Canine Services.

Solimini has spent decades training dogs not only for MCSO but also for agencies nationwide.

“It’s disturbing to watch video like this, but sometimes you have to see those things to know what these guys go through on a daily basis,” he added.

Winn came out after a two-hour standoff. Officers used tear gas and a rubber bullet to get him into custody.