Security employee David Duncan, 41, saved police officer James M. Melia, 61, from an Aug. 24, 2017, assault in Hyannis, Mass. Officer Melia was attempting to take a man into custody when the man fought with him and they fell to a sidewalk. A security employee, Duncan, stood nearby as the two men struggled. When another man, armed with a knife approached the scuffle, Duncan told the man to drop the knife, and then blocked the man’s path to Melia. Using both hands, he grasped the man’s hand and wrist, and they struggled. Duncan disarmed the man and threw the knife away from them. Other officers arrived shortly and arrested the assailants. Melia suffered a cut to his left hand and recovered; Duncan was not injured.