Chris kelly of the '90's rap duo Kriss Kross suddenly died on May 1 at his Atlanta home.

Two months later the toxicology screening has confined that the death was due to a mixture of drugs in his system.

Photo Gallery: Kriss Kross Through the Years  

The investigator format he Medical Examiners' office said that the screening showed a fatal mixture of drugs while Chris' mother told police the rapper had been doing cocaine and heroin the night before he died. 

TMZ had posted this video showing a wasted Chris trying to rap just hours before his death. 

Rest in Peace!

(Photo Via 'Getty Images')