Transcript for Video Shows Police Officer Punching a Woman in Flagstaff, Arizona
Next here, the alarming confrontation in flagstaff, Arizona. A police officer skuchfulling with a woman. He is then seen punching her in the face as another officer holds her back. Authorities now say the woman was attempting to get away, but tonight, the incident is under investigation, and here's ABC's senior justice correspondent Pierre Thomas. Reporter: Yet another controversial police encounter caught on tape. An officer punching a female suspect in the face during an eviction. Slow it down and you can see the force of the punch. Punched in the face two times, I was choked. Just a brutal attack. Reporter: But the officer claims the woman resisted arrest, kicking and kneeing him in the groin. Flagstaff, Arizona, police learned of the encounter after the video was posted on Facebook. Authorities say the officer has no history of excessive force. We immediately became conceconce concerned, so, we initiated an internal investigation, and placed the officer on administrative leave. I didn't do anything! Reporter: The case, the latest indicator how the prif lens of surveillance cameras and smartphones are placing officers are under increasing scrutiny. It's become reflex for citizens to record interactions with police. Like we saw here in Alabama last November, when college students reached for their cameras and later recorded police beating them. Back in Arizona, the police chief says there is officer body camera video, and that in the interest of transparency, he'll post that video online. David? Pierre Thomas with us again tonight, thank you.
This transcript has been automatically generated and may not be 100% accurate.