People.com Celebrity Drew Barrymore's Half Sister Jessica Barrymore's Death Ruled Accidental A coroner's report states that Barrymore had a mixture of drugs in alcohol in her system By Gabrielle Olya Published on August 27, 2014 02:35 PM Share Tweet Pin Email Photo: Jessica Barrymore/Facebook; Inset: Sara De Boer/Startraks Last month’s death of Jessica Barrymore, half sister to Drew Barrymore, was caused by an accidental overdose, according to the San Diego Coroner’s Office. Jessica’s body was discovered in National City, California, on July 29, when a woman found Jessica in a parked car that was blocking her driveway. The Fire Department responded and confirmed her death without medical intervention, according to the coroner. Results of the coroner’s investigation show that Jessica died of acute intoxication and had a combination of alcohol and drugs – including methamphetamine, methadone, tramadol and nordiazepam – in her system upon her death, which took place two days before what would have been her 48th birthday. “Although I only met her briefly, I wish her and her loved ones as much peace as possible, and I’m so incredibly sorry for their loss,” Drew previously said in a statement released to PEOPLE. Want more stories like this? Sign up for our newsletter and other special offers: sign me up Thank you for signing up!