PITTSBURGH (CBS SPORTS) — The Allegheny County Sheriff’s Office is investigating whether a Raiders player taunted a police dog at Heinz Field before last Sunday’s game against the Steelers.

“We were immediately notified about the incident, and we immediately initiated a criminal investigation into the matter,” Allegheny County Sheriff’s Office Chief Deputy Kevin Kraus said, via CBS Pittsburgh. “Sheriff’s Office supervisors interviewed witnesses and reviewed video surveillance recordings at Heinz Field. We notified the District Attorney’s Office on Sunday. The Sheriff’s Office is currently reviewing all of the information and reports to make a final determination relating to charges.”

Sources told KDKA’s Richie Walsh that Raiders linebacker Ray-Ray Armstrong had been identified as the player who “lifted up his shirt, beat his chest, and started barking and yelling at the K-9 before the start of the game.”

Read more on CBSSports.com