King County public-integrity prosecutors have concluded that Bellevue police were justified when they shot a man armed with a sword and high-powered air rifles last summer. The Aug. 8 shooting death of Patrick Sathyanathan , 60, by a police sniper was deemed to fall within the law governing police use of deadly force. Sathyanathan had approached a neighbor with a sword and, after police arrived, fired on officers with a large-caliber, high-powered air rifle. Bullets struck neighbors’ homes, perforated a garage door and patrol cars, and broke the side-view mirror on the department’s “Bearcat” armored vehicle, according to an investigation conducted by the King County Independent Force Investigative Team. Senior Deputy Prosecutor Joe Marchesano said the projectiles were capable of inflicting serious bodily injury, and that Sathyanathan fired the weapon from a “sniper’s perch” inside his town house. Police had been called to the house before and knew he had powerful air rifles in the residence.…