It happened Sunday at 8:00 p.m. in the unit block of Baylis Street in the Maple Hill Townhouses development.
First responders arrived to find a 19-year-old man shot in the upper body.
Medics rushed him to Christiana Hospital where he was treated for his injury and released.
Police say the suspect is described as a tall black man.
Anyone with information on this crime is asked to call the New Castle County Police Department at 302-395-8110 or visit its website at www.nccpd.com.
Tips can also be provided via at 847411 (TIP411). Begin your message with NCCPD and then type your message. Tipsters may call Crime Stoppers as well at (800) TIP-3333.