Police bodycam footage shows a man body-slamming a suspect who was resisting arrest in Provo, Utah, police said.
Officer Austin Williams was responding to a Sam’s Club on July 24 for a welfare check when a man attacked the officer, then fled on foot.
As he was fleeing, bodycam video shows an unidentified man lift the suspect in the air and slam him to the ground.
"Chief Ferguson wants to thank that person for coming to the aid of an officer in need. We take pride in serving and protecting in Provo, so we are grateful to the unknown person who returned the favor and helped us safely take a dangerous person into custody," the department said in a Facebook post.
The suspect was arrested and is facing charges including assaulting an officer.