Eminem, Slaughterhouse & Yelawolf link up for "Psychopath Killer" off 'Shady XV'

Detroit rap veteran Eminem has been getting press for all the wrong reasons leading up to his new Shady Records anniversary project Shady XV. After threatening Lana Del Rey with violence in one track, he's since made rape references in regards to Iggy Azalea. Fortunately for new leak "Psychopath Killer,"...