It happened before 10 p.m. Tuesday in the 900 block of Maryland Avenue.
Officers arrived to find 29-year-old Brian Brooks of Wilmington lying on a porch.
Deadly Wilmington Shooting
Medics rushed him to Christiana Hospital in critical condition.
He later died.
Police are asking for the public's help identifying and tracking down the gunman.
Fatal shooting in Wilmington
Anyone with information is asked to call Detective Brian Conkey at 302-576-3660.
Information may also be left on The Delaware Crime Stoppers TIPLINE at 1-800-TIP-3333, where information received may lead to a reward.
Tips can also be texted to 888777.
----------
Send a breaking news alert
Report a correction or typo
Learn more about the 6abc apps