A female police detective was found dead in a stairwell at 515 East 88th Street last night. A gun was in Carmen (Lydia) Martinez's lap, and the police believe she killed herself. Martinez did not live in the Upper East Side building, but her boyfriend, retired Deputy Inspector Bil' Bayer, does.

The Daily News reports that the building super's wife found Martienez, after hearing a noise. A neighbor said the super's wife "met the lady in the lobby a few minutes before and said she looked weird." Daily News sources say Martinez had marital problems, while the Post describes her as single.

Martinez, who was recently promoted to first-grade detective, was a 23-year NYPD veteran. She worked in domestic violence and counter terrorism divisions.