Capitol Police Officer Who Responded To Mob Attack Dies Off Duty Howard Liebengood, a 15-year veteran of the U.S. Capitol Police, died Saturday off duty, according to the force. The police gave no cause of death. In a statement, the U.S. Capitol Police Labor Committee said Liebengood, 51, was among the officers who responded to the rioting at the U.S. Capitol on Wednesday. "We are reeling from the death of Officer Liebengood," union Chairman Gus Papathanasiou said in a statement. "Every Capitol Police Officer puts the security of others before their own safety and Officer Liebengood was an example of the selfless service that is the hallmark of USCP. This is a tragic day."