I just went to your link and literally zero of the shootings you are apparently referring to are in Anacostia. In fact on the map you linked there are only two crimes at all in Anacostia, one burglary and one robbery.

However the map you linked is showing crimes in a massive portion of the area, all the way from Suitland (which isn't even in DC) to Carver Langston which isn't in the same Ward or even Quadrant as Anacostia, which leads me to believe that you either don't understand how to use or read that crime map or you don't know what Anacostia even is.