Los Angeles authorities have launched a criminal investigation into the death of Bobby Brown Jr. A spokesperson for the Los Angeles Police Department confirmed to Fox News on Tuesday that there is currently an ongoing criminal investigation into Brown Jr.’s overdose. According to the Los Angeles County Medical Examiner's report obtained by Fox News on Monday, the 28-year-old son of singer Bobby Brown Sr.'s death was due to the "combined effects of alcohol, cocaine and fentanyl." Brown Jr.