Under state law, it is a third-degree felony to "willfully or maliciously taunt, torment, tease, beat, kick or strike a police animal." Even though he didn't make contact with the animal, if convicted, Armstrong could face seven years in jail and a maximum fine of $15,000.
The investigation is ongoing, says Kraus.
"Sheriff's Office supervisors interviewed witnesses and reviewed video surveillance recordings at Heinz Field. We notified the District Attorney's Office on Sunday," he told CBS Sports. "The Sheriff's Office is currently reviewing all of the information and reports to make a final determination relating to charges."