He attributed her death to adhesions (or, scar tissue) that developed after bariatric surgery years ago.
This is a known long term complication of this pop in of surgery.
Carrillo also revealed autopsy toxicology results, which showed therapeutic levels of oxycodone in Presleys blood.

Lisa Marie PresleyChristopher Polk/Getty Images
There is no evidence of injury or foul play.
The manner of death is deemed natural, Carrillo concluded.
TMZwas first to break the news.

She died in Los Angeles afterbeing rushed to the hospital.
She was 54 and was buried at her fathers Graceland estate in Memphis, Tennessee.
Greg Evans contributed to this report.