“Autumn Crittendon’s Cause of Death Confirmed: Fentanyl and Para/Meta-Fluorofentanyl Poisoning, Investigation Points to Shocking Source”.hienca

Autumn Crittendon. Photo:

Autumn Oxley/Facebook

Autumn Crittendon‘s cause of death has been confirmed.

On Tuesday, Oct. 22, a spokesperson from the Office of the Chief Medical Examiner in the Virigina Department of Health confirmed to PEOPLE that the 16 & Pregnant star died from toxicity from fentanyl and para/meta-fluorofentanyl, which is a synthetic opioid similar to fentanyl. Her manner of death was ruled as accidental.

Crittendon was found dead on Saturday, July 20 when the Henrico County Police Department responded to a medical emergency regarding an unresponsive adult woman. In a statement shared with PEOPLE at the time, police confirmed that paramedics attempted “life-saving measures however they were not effective.”

Autumn Crittendon. Autumn Oxley/Facebook

She was later pronounced “deceased at the scene” and Henrico Police classified the incident as a death investigation. She was 27.

On Sunday, July 21, Crittenfon’s sister, Misty, changed her profile picture on Facebook to a sweet snap of the pair as children, followed by the hashtags: “#JusticeforAutumn #CrittendonStrong.”

The reality star had three children and appeared on MTV’s 16 and Pregnant in season 5. At the time, she was pregnant with her first son Drake.

A few days later, Crittendon’s mother-in-law, Tiffany Oxley, also paid tribute to the reality star with a short but sweet message to her Facebook account.

“I miss you. God has gained another angel way too soon. I love you,” she wrote on July 22.

Oxley was a consistent viewer of Crittendon’s Facebook posts, often commenting on photos of her and her children.

Never miss a story — sign up for PEOPLE’s free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer​​, from celebrity news to compelling human interest stories.

“Look at that amazing lady with her most handsome young men and a beautiful little girl,” she wrote on one image of Crittendon from January 2023.

MTV’s Teen Mom franchise also released a statement on X in her honor. “We are deeply saddened to learn about the passing of Autumn Crittendon,” it read. “Our hearts go out to her family and friends during this difficult time.”