Last Updated Feb 24, 2016 12:28 AM EST
DALLAS -- Antonin Scalia suffered from coronary artery disease, obesity and diabetes, among other ailments that probably contributed to the justice's sudden death, according to a letter from the Supreme Court's doctor.
Presidio County District Attorney Rod Ponton cited the letter Tuesday when he told The Associated Press there was nothing suspicious about the Feb. 13 death of the 79-year-old Scalia. He said the long list of health problems made an autopsy unnecessary.
Ponton had a copy of a letter from Rear Adm. Brian P. Monahan, the attending physician for members of Congress and the Supreme Court. The letter was to Presidio County Judge Cinderela Guevara, who conducted a death inquiry by phone and certified Scalia's death.
The letter dated Feb. 16 said Scalia's many "significant medical conditions led to his death," Ponton said.
In the letter, Monahan listed more than a half-dozen ailments, including sleep apnea, degenerative joint disease, chronic obstructive pulmonary disease and high blood pressure. Scalia also was a smoker, the letter said.
Ponton declined to provide a copy of the letter, saying an open records request must be made to Guevara, who did not respond to a phone message Tuesday.
The AP filed a records request with the judge last week, but she did not provide the letter or respond to a reporter's phone message Tuesday. The Texas Department of State Health Services has declined to release a copy of the death certificate.
Scalia was found dead in his bed at a ranch not far from the Mexico border, where he had gone on a hunting trip.
A breathing apparatus was found on the night stand next to Scalia's bed when his body was found, but he was not hooked up to it and it was not turned on when he died, according to a Presidio County Sheriff's Office incident report obtained late Tuesday by The Washington Post.
Nothing appeared out of place around Scalia's bed, according to the report. Three pillows were stacked to elevate Scalia's head. A top pillow appeared to have toppled onto his eyes and forehead but didn't appear positioned to impede his breathing, the report stated.
His arms were at his side atop the bed covers, which were pulled up to his chin. The bed covers were smooth and creased and showed no sign of a struggle, according to the report.
Guevara, who as county judge is the top administrator in the area, previously said she conferred by phone with Sheriff Danny Dominguez and a U.S. marshal before certifying the death. On the day Scalia died, she also conferred with Monahan by phone before determining the cause of death.
Scalia's death "was handled in a similar fashion as the cases of other elderly people who have died in Presidio County," Ponton said.
In rural Texas, justices of the peace investigate deaths, among other duties, but the two justices in the region were out of town and unavailable. Guevara was also out of town but agreed to conduct the death inquiry by phone.
The Supreme Court does not provide regular reports about the justices' health. It is left to each court member to decide how much to make public about medical conditions.
The Supreme Court's press office could find just one release in 29 years pertaining to Scalia's health, a report of surgery in 2003 to repair a torn rotator cuff in his right shoulder.