Police Officer on Leave After Video Captures Him Punching Woman in the Face

The Arizona officer says he was being kneed and kicked in the groin before he threw the punch.
1:58 | 11/18/16

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Transcript for Police Officer on Leave After Video Captures Him Punching Woman in the Face
Now to an alarming confrontation with an Arizona police officer caught on camera. The officer seen scuffling with a woman and then pumping her. He now says there is more to the story. Our senior justice correspondent Pierre Thomas has more. Good morning, Pierre. Reporter: Good morning, robin. Today an Arizona patrolman has been placed on administrative leave after yet another controversial police encounter, as you said, caught on tape. The video is jarring. An officer punching a woman in the face during an eviction. Hey, you can't hit a girl like that. Look again in slow motion. A direct blow to the face. Punched in the face two times, I was choked. It was just a brutal attack. Reporter: But the flagstaff police officer Jeff Bonar who apparently has no history of excessive force claims Marisa Morris resisted arrest kicking and kneeing him in the groin before he hit her. Something she denies. The case now under investigation. We became aware of this incident primarily through social media. We immediately became concerned. Reporter: Overnight authorities releasing clips from the officer's body camera showing the moments following the tense exchange. But not the entire encounter. Stop. Reporter: Police now looking into why the officer did not turn his camera on when the exchange started to get heated. I didn't do anything. Reporter: The kasem bombic of the overwhelming prevalence of cameras and smartphones placing police under more scrutiny. It's become reflex to pull out their phones and record interactions with police. Like we saw here in Alabama last November when college students reached to are their cameras in unison and later recorded police beating them. Back in the Arizona case you can hear the bystander comforting the woman. I got it on camera. Reporter: It's a complicated case. A classic he said/she said and now police under the microscope must make a judgment call as to whether the officer broke the law. Hope they get to the bottom of it. All right, Pierre, thank you.

This transcript has been automatically generated and may not be 100% accurate.

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