The Los Angeles County Coroner reported today that the son of hip hop record producer and rapper Dr. Dre died from an overdose of heroin and morphine. The drug tests had been pending for more than four months. The coroner's office wouldn't explain why it took so long for the report to be released -- a report that normally takes between six to eight weeks to disclose.

Andre Young Jr. was found dead at his Woodland Hills home on August 23. Young had been out the previous night and returned home Saturday morning around 5:30 a.m., according to Assistant Chief Coroner Ed Winter. Young's mother went to check on him in his bedroom around 10 a.m., found him unresponsive and called 911. Andre Young was 20.

Andre Young Sr., better known as Dr. Dre, shot to fame with the influential gangsta rap group N.W.A. He later became co-owner of Death Row Records. In 1993, he won a Grammy Award for the single "Let Me Ride." As a producer, Dre was credited with popularizing West Coast G-funk.

Dr. Dre is the founder and current CEO of Aftermath Entertainment.

Editor's note: A misidentified photographed ran in several online accounts of this story and originally accompanied this article.