An autopsy has revealed Bobby Brown Jr.’s cause of death: a lethal combination of alcohol, cocaine and fentanyl. It’s the latest example in a string of tragedies related to substance abuse that have plagued the life of famed singer Bobby Brown.

Bobby Brown Jr. was found dead in November. He was 28 years old at the time, CNN reports.

“Losing my son at this point in our lives has devastated my family. There are no words to explain the pain,” his father said.

A report from the Los Angeles County coroner labeled the death accidental, noting his “history of alcohol and drug use" and an abrasion on his arm. No internal injuries were reported.

Bobby Brown has also struggled with substance abuse. His former wife Whitney Houston died in 2012, accidentally drowning herself in a bathtub. Her coroner's report listed heart disease and cocaine as contributing factors.

The pair’s only child, Bobbi Kristina Brown, was also found unresponsive in a bathtub two years later. She was taken to the hospital but passed away after six months in a coma.

An autopsy found her death to be caused by immersion and intoxication, leading to a combination of pneumonia and brain damage.

Landon Brown, Bobby Brown Jr. and Bobby Brown
From left: Landon Brown, Bobby Brown Jr. and Bobby Brown attend the premiere screening of "The Bobby Brown Story" on Aug. 29, 2018 in Hollywood, California. Jesse Grant/Getty Images