Officer Craig E. Lehner,34, with the Buffalo Police went missing on diver training in the Niagara River off Broderick Park on 10/13/17 and his body recovered on 10/17/17 after a five day search of the river. Divers, in pairs of two, were conducting search patterns on the river bottom. Search teams were using “robotic vehicles with cameras” to try and find the missing officer. The Air One helicopter from the sheriff’s office was used in the air. Cadaver search dogs brought in from the state Federation of Rescue Teams were also used on the shore and on boats in the hope that they can provide clues and narrow the area where the officer went missing. In addition to the agencies on the scene, a piece of “extremely sophisticated sonar technology” that normally is used by the U.S. Navy was flown to Buffalo from the New York Police Department by a State Police Aviation Unit to assist in the search.