Pittsburgh Police Lt. Catherine McNeilly, a key figure in the controversy surrounding former city Operations Director Dennis Regan, went to federal court yesterday seeking to regain her job as police commander. Lt. McNeilly's testimony painted a picture of a police bureau that, under the late Mayor Bob O'Connor, was regularly subject to interference by his friend and aide, Mr. Regan, even though he had no official role in public safety. Lt. McNeilly sent the e-mail to City Council outlining her concerns about Mr. Regan -- expecting it to be kept confidential.