The head of the Omaha police unit in charge of bomb detonation has retired after fecal matter was found at the Omaha Public Safety Training Center. Omaha Police Sgt. Matthew Manhart, who oversaw the department’s bomb response unit, had been accused of depositing his own fecal matter where a manager at the training center would find it, according to three sources with knowledge of Manhart’s departure. Reports varied on exactly where it was left, but it was in the open and not in a toilet, the sources said. Manhart reportedly had continuing concerns over storage and care of the bomb...