What happened to Officer Lehner underneath the Niagara River? – Buffalo News October 30, 2017 Scuba Diving Buffalo News What happened to Officer Lehner underneath the Niagara River ? Buffalo News The search for Buffalo Police Officer Craig Lehner, who disappeared during scuba diving develop on Oct. 13, went on in the fast-moving, debris-filled water of the Niagara River for five days. Here, the Monroe County Sheriff’s Department helped in the …