The former American Idol contestant died of natural causes as the result of a disease called dilated cardiomyopathy, a condition in which the heart becomes weakened and enlarged, the Orange County coroner’s office tells PEOPLE.
Johns had suffered a blood clot in his leg a few days before he passed away on Aug. 1, but some reports suggested that alcohol may have played a role in his death.
The coroner’s report noted that the Idol fan favorite did have a “fatty liver” – which is common in those who drink alcohol frequently – but added that this was only a contributing factor, and was not the ultimate cause of the singer’s untimely passing.
Johns is survived by his wife, Stacey, who helped organize a memorial for Johns in September.
“It’s been very emotional to put together, but it has been somewhat therapeutic as well,” Stacey told PEOPLE at the memorial. “It’s been overwhelming to see how much people loved him.”