After Justice Antonin Scalia's sudden death on Feb. 13 conspiracies theories about its causes were rampant (You can read more on those stories here, here and here at HNGN). But now doctors have confirmed that there was nothing unnatural or suspicious about Scalia's death.

According to a letter by Rear Adm. Brian P. Monahan, "significant medical conditions led to his death," reports the Associated Press.

The contents of the letter were made public by Presidio County District Attorney Rod Ponton. According to the letter by Monahan, who also attends to members of Congress and the Supreme Court, Scalia was suffering from "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," reports the Associated Press.

Sheriff's reports obtained by The Washington Post show that on the night of his death, a Continuous Positive Airway Pressure (CPAP) machine, that Scalia would have been using due to his sleep apnea, had been left unplugged. Speculators opine that Scalia might have forgotten to use it the night of 13 Feb.

According to Cinderella Guevara, presiding judge of a county court, who had pronounced Scalia dead, "...the death certificate will say that he died of natural causes with myocardial infarction, better known as a heart attack, being a contributing factor," reports ABC News.