linebacker is under investigation by the Allegheny County Sheriff's Office for at Heinz Field before Sunday's game against the .Sources told KDKA's Richie Walsh that Armstrong "lifted up his shirt, beat his chest, and started barking and yelling at the K-9 before the start of the game." And while no charges have Jerick McKinnon Jersey been filed, taunting a police K-9 carries a third-degree felony charge in Pennsylvania.On Tuesday night, Raiders coach Jack Del Rio said he hadn't spoken with Armstrong, and understood, in general, why Rashad Fenton Jersey the charges against a police dog would be so severe. But Del Rio doesn't think the circumstances in Armstrong case are applicable.The latest from SportsLine"I've caught wind of this story. I'm going to put it in the 'silly' category," Del Rio said during an appearance on SiriusXM NFL Radio (via ). "I think once the facts come to light I don't think there's going to be much of an i sue. I wouldn't Jarran Reed Jersey make too much of it." Armstrong offered a "no comment" on Tuesday when asked about the incident. Demarcus Robinson Jersey Legally, he could have been arrested on the spot, Allegheny County Sheriff's Office Chief Deputy Kraus told the . We believed that there was sufficient probable cause to make an arrest.Instead, the deputy identified the player and contacted a supervisor, who initiating the criminal investigation."We were immediately notified about the incident, and we immediately initiated a criminal investigation into the matter," Kraus said, via CBS Pittsburgh. "Sheriff's Office supervisors interviewed witne ses 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 Derrick Gore Jersey to charges."