The suspect physically restrained the victim and then sexually assaulted her while in the alleyway. The suspect then fled the area on foot.
The suspect is described as a black male approximately 5'10, muscular build, bald and clean shaven.
Wilmington Police are asking any one with any information regarding this incident contact Detective Brian Conkey at 576-3660 or 911.
You may also contact Delaware Crime Stoppers. Callers may remain anonymous. Tips may also be forwarded to law enforcement through tip lines maintained by Delaware Crime Stoppers at 1-800-TIP-333 3 or on line at www.tipsubmit.com.
You can get the latest crime statistics from the Philadelphia Police by CLICKING HERE for the force's crime data mapping site.