An Atlanta Medical Examiner's office has confirmed that rapper Chris Kelly died from a drug overdose back in May of this year. The member of the 90s hip-hop duo Kriss Kross passed away not too long after an anniversary show with fellow performer Chris Smith.

Authorities suspected a drug overdose as the cause back on May 1, 2013 when Atlanta Police found Kelly motionless at this home. Fulton County Medical Examiner Betty Honey validated the claim with the official toxicology report this past Monday.

Honey, who pronounced Kelly dead at Atlanta Medical Center back in May, said she could not confirm which drugs were in the rapper's system at the time of his death, the Associated Press reported. Kelly's mother informed investigators that her son had used cocaine and heroin the night before his death.

Also known as a "speedball," mixing cocaine and heroin forms a lethal cocktail that can end with disastrous consequences. When taken together, cocaine, a stimulant, and heroin, a depressant, can have damaging effects on the body's central nervous system.

According to a recent Centers for Disease Control and Prevention report, the rate of drug overdoses has risen for the 11th straight year. Although most accidental deaths were attributed to prescription painkillers, a long list of celebrity deaths have been attributed to this dangerous concoction, including comedians John Belushi and Chris Farley.

"The Drug overdose deaths rose for the 11th straight year, federal data show, and most of them were accidents involving addictive painkillers despite growing attention to risks from these medicines. The big picture is that this is a big problem that has gotten much worse quickly," said Dr. Thomas Frieden, head of the Centers for Disease Control and Prevention.