A man who was accused of killing a 9-year-old girl with chloroform while trying to sexually assault her was found unresponsive in a Colorado jail cell, according to the Mesa County Coroner’s Office.

Jeffery Beagley, 34, of Grand Junction, was found unconscious in his cell on Monday, Dec. 23, and died later at the hospital, The Sentinel reported. An autopsy said the manner of Beagley’s death is still pending toxicology results, the Mesa County coroner’s office said Tuesday, Dec. 24.

Beagley was charged with first-degree murder, attempted sex assault, child abuse resulting in death, and reckless manslaughter in relation to the Nov. 9 death of the girl. An autopsy confirmed she died of chloroform poisoning.

Investigators said a bottle of chloroform had been delivered to Beagley a day before he called emergency responders to report the girl had died. A chloroform-soaked rag can be used by assailants to render a victim unconscious to facilitate sexual assault, according to the affidavit.

Officials located a makeshift tent behind the home where the little girl died. Inside the tent, investigators reportedly found blood-stained blankets in addition to pillows, space heaters, a laptop, a video camera, and an empty chloroform bottle.

Investigators found more than 1,100 pictures and 73 videos depicting child pornography—some of which showed the victim—on Beasley’s laptop.

Beagley was arrested on Dec. 13 and had been jailed without bond. He had not entered a plea to the charges.

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