A woman, who officials said is in her 30s, told police that she was waiting for a bus at 52nd and Market streets to go to the 69th Street Terminal when Corley pulled up in his squad car and picked her up.
The woman told police that Corley drove her to an area of Cobbs Creek near Cedar Avenue and raped her in the back seat of the car before dropping her off at the terminal, police said.
The woman told police of the alleged incident later that morning and, soon after, the police Internal Affairs Department and Special Victims Unit launched an investigation.
Police interviewed the woman and probed Corley's squad car - which officials said yielded DNA evidence linking him to the alleged assault.
Corley is charged with rape, involuntary deviant sexual intercourse, sexual assault, indecent assault, indecent exposure and official oppression, Jamerson said.
Commissioner Charles Ramsey suspended Corley for 30 days with the intent to dismiss him, police spokeswoman Officer Tanya Little said.
Corley is the 33rd police officer to be arrested since 2009. He's the third to be arrested this month and the second this week.
John Mouzon, a 16-year veteran of the department, was arrested Monday and charged with assault after allegedly fighting with his girlfriend in Germantown while off-duty.
On Aug. 18, Officer Sean Jang - from the 18th District like Corley - was arrested on assault charges after a fight with his ex-girlfriend.