The incident was reported Monday around 8:15 p.m. in the 6800 block of Wisconsin Avenue.
Montgomery County police say the victim, 33-year-old Lawrence Richard Wilson, Jr., was found with trauma to his body and was pronounced dead at the scene.
Wilson was killed Sunday, but his body wasn't found until Monday when a caller contacted police to report that they had information regarding the stabbing death of a man at the Target on Wisconsin Avenue in Bethesda.
Wright arrived at the Second District Station on Monday to report that he witnessed the stabbing at the Target.
Wright agreed to speak with Major Crimes detectives and gave statements that identified Lawrence and Uchemadu. Based on evidence discovered during the investigation, detectives were able to connect the suspects to the homicide.
All three suspects, 16-year-old Antonio Lawrence, 17-year-old Joshua Wright and 18-year-old Blaise Uchemadu, have been arrested and charged with first-degree murder, armed robbery and conspiracy to commit robbery. They are being held at CPU without bond.
This is an active and ongoing investigation. Anyone with information regarding this crime is asked to contact the Montgomery County Police Major Crimes Division at 240-773-5070 or call 240-773-TIPS.