Officers were called to the 7700 block of Annapolis Road around 11:30 a.m. Thursday for a welfare check.
Upon arrival, police found 27-year-old Armando Cousins-Stoute, who had no fixed address, suffering from a gunshot wound. He was pronounced dead at the scene.
Homicide Unit detectives are working to determine a motive and identify the person or people responsible.
Authorities are offering a reward of up to $25,000 for information that leads to an arrest and indictment in this case.
Anyone with information is urged to contact the Homicide Unit by calling (301) 516-2512.
This is a developing story. Stay with Daily Voice for updates
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