Country Singer Luke Bell Died of an Accidental Fentanyl Overdose After Going Missing

Luke Bell's cause of death was a fentanyl overdose.

The country singer died at age 32 in Tucson, Arizona, on Aug. 26 after going missing six days prior.

An autopsy report from the Pima County Medical Examiner's office, reportedly obtained by PEOPLE, reveals that an unresponsive Bell was found by a passerby in a shaded area of a parking structure. Drug paraphernalia was present.

According to a toxicology report ordered by the medical examiner, the singer had a lethal amount of fentanyl in his system and has also been drinking.

According to the autopsy, Bell also suffered arteriosclerotic cardiovascular disease at the time of his death but it was not what caused his death.

The medical examiner writes in the report, "in consideration of the known circumstances surrounding this death, the available medical history, and the examination of the remains, the cause of death is ascribed to fentanyl intoxication."

"The manner of death is accident," the medical examiner concludes.

Frazer Harrison/Getty Luke Bell

RELATED: Luke Bell's Family Speaks Out About Mental Health After His Death at 32: 'We Are Heartbroken'

ABC 9 KGUN9 Tucson was the first to report news of the medical examiner's findings on Tuesday.

Bell's friend Matt Kinman confirmed the singer had died to Saving Country Music on Aug. 29.

According to Saving Country Music, Bell was diagnosed with bipolar disorder and his "mental state took a turn for the worse" over recent months.

"Luke fought this as hard as he could, but the disease got the better of him," Bell's manager, Brian Buchanan, told TMZ. "When he was beating the disease, he was the sweetest and most generous guy. He's found peace now and there's some comfort."

In a statement shared with PEOPLE earlier this month, the country singer's relatives said they had "lost our beloved son, brother, and friend and we are heartbroken," after Bell was found dead.

"Unfortunately Luke suffered from the disease of mental illness, which progressed after his father's death in 2015," the family added in their statement. "Luke was supported through his disease by a community of loving family and friends. Despite this, he was unable to receive the help he needed to ease his pain."

The family added that their "hearts go out to the millions of people affected by mental illness who, like us, understand the devastating disappointment of a system that consistently fails to provide caring solutions to those who suffer."

Bell's loved ones praised him for having "a gentle heart, a wanderer's spirit and a musical gift that he was fortunate to share with us and the world."

Laura E. Partain Luke Bell

RELATED: Country Singer Luke Bell Dead at 32 After Going Missing in Arizona

"We are so grateful to his friends and fans for embracing Luke and his music. We would like to thank all of Luke's fans, friends and family who have been sharing stories and photos of happy times with him," they continued.

"As we navigate our heartbreak we respectfully ask for privacy to allow us room to grieve and honor his memory. Our only comfort comes in the fact that our Luke is finally free and at peace," the family concluded.

If you or someone you know needs mental health help, text "STRENGTH" to the Crisis Text Line at 741-741 to be connected to a certified crisis counselor.

If you or someone you know is considering suicide, please contact the 988 Suicide and Crisis Lifeline by dialing 988, text "STRENGTH" to the Crisis Text Line at 741741 or go to 988lifeline.org.