5 (Murder by Numbers) is a mixtape that was set to be 50’s fifth studio album, a follow up to his 2009 studio album, Before I Self Destruct. However, 50 decided to release it as a mixtape, mainly because Interscope Records hated the album title. Production was handled by Focus…, Hit-Boy, Havoc and the project featured only 4 artists—Kidd Kidd, Guordan, Brevi and ScHoolboy Q.