Telly Ruidoso Allen, 28, of the 9600 block of Gwynndale Drive, was shot before 10 p.m. in the 3400 block of Dodge Park Road, police said.
His friends took him to a nearby hospital, where he died, police said.
Police are asking anyone with more information to call the Homicide Unit at 301-772-4925. Callers wishing to remain anonymous can call Crime Solvers at 1-866-411-TIPS. A cash reward is available for tips that lead to an arrest and indictment.
Also, Police Chief Melvin C. High has created an additional reward of up to $25,000 for tips. Call the Violent Crimes Tip Line at 1-866-698-7424 to leave an anonymous tip.