Rival gangs use the songs to goad each other - and this often escalates into real-world violence. As a result, the music has offered prosecutors the chance to link murderous thugs to their crimes.
London Drill Rapper Kay-O Convicted In Kacey Boothe Murder 103weup.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from 103weup.com Daily Mail and Mail on Sunday newspapers.