From a DC Police report: Detectives from the Metropolitan Police Department’s Homicide Branch are investigating a homicide that occurred on Friday, September 18, 2020, in the 2300 block of Ainger Place SE, Washington DC. At approximately 9:00 pm, members of the Seventh District responded to the listed location for the report of a shooting. Upon arrival, officers located an adult male, unconscious and unresponsive, suffering from gunshot wounds. Upon canvassing the area, officers located an adult female suffering from a graze wound. DC Fire and Emergency Medical Services responded to the scene and determined that the adult male victim displayed no signs consistent with life. The adult female victim was treated on scene for non-life threatening injuries. The decedent has been identified as Marcos Brooks, 56, of Beltsville, MD.
I do not know for certain if this collection of balloons is meant as a memorial for Mr. Brooks. I documented it in the Woodland Terrace community, in the block where he was slain.