D.C. Mayor Adrian Fenty, MPD Chief Cathy Lanier and U.S. Attorney Jeffrey Taylor have scheduled a news conference for 1:15 p.m. to announce further developments in the Chandra Levy case. The Associated Press has just reported that an arrest warrant has been issued for Ingmar Guandique, the suspect named in news reports late last month. Guandique is currently in federal prison in Adelanto, Calif., for attacking two other women in Rock Creek Park. We’ll…