The Chester County Coroner's Office revealed in a statement to RadarOnline.com, "The cause of death was fentanyl, heroin and ethanol intoxication, with the manner of death being accidental."
The MTV star was 43 years old at the time of his March 29, 2018 death. He died at Phoenixville Hospital in Pennsylvania.
"While some progress is being made in the battle against substance abuse, we continue to lose too many members of our community to this epidemic," Chester County Coroner Dr. Christina VandePol told RadarOnline.com. "Speaking with families like Mr. Lancaster's, I hear so often about how difficult it is to fight addiction and how we are losing talented and loved people to this disease."
Although she admitted how her son had "a few bad years," she insisted he was sober at the time of his death.
"As far as I know, he was clean," she said. "As far as we know, he wasn't using and hasn't been. This is a surprise."
Brian, who appeared on season 7 of Road Rules in 1999, was arrested on January 2014 for possession of a controlled substance, possession of marijuana and use/possession of drug paraphernalia.
He pled guilty to use/possession of drug paraphernalia. The other two charges were withdrawn. He was sentenced to one-year probation.
On March 10, 2013, he was arrested for driving under the influence of a controlled substance with nine charges against him. Other charges included possession of a controlled substance, use/possession of drug paraphernalia, DUI: controlled substance – combination of alcohol/drugs and more. The charges were waived or withdrawn.
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He was charged with possession of a controlled substance, use or possession of drug paraphernalia, tampering with/fabricating physical evidence and false swearing on June 23, 2013. He pled guilty to use or possession of drug paraphernalia and tampering with/fabricating physical evidence. The possession of drug paraphernalia and false swearing were withdrawn. He was sentenced to a one-year probation.
Brian was charged with driving under the influence on April 22, 2007. Additional charges include careless driving, reckless driving, following too closely and more traffic-related violations. All charges were dismissed or withdrawn.
He arrested for driving under the influence of alcohol and careless driving on February 9, 2000.
He pled guilty and was sentenced to two days to 12 months in prison. He was not prosecuted on the careless driving charge.
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