That's according to teenager's father, who posted on Facebook over the weekend about Devin Delaney's autopsy report saying they chose to share the details "so friends of Devin know what happened, and Devin's image remains true."
"Devin passed peacefully in his sleep due to cardiac dysrhythmia, as a consequence of a myocarditis. Myocarditis is an inflammation of the heart, most commonly the result of viral infection," Tom Delaney wrote in the post.
He also noted that there were no signs of drugs or alcohol in his son's system when he died, nor were there any signs of injury that would have "caused or contributed" to his death.
Tom Delaney stressed that his son and friends "did not make any choices, do any actions, or lack of action, that weekend that could have contributed to his death in any way."
He also criticized some media outlets for suggesting Devin Delaney died because he was binge drinking.
At the time of his death, officials did not give any reason for how he died, except to say that there was no sign of foul play.