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El Dorado Co. sheriff: Missing teen's autopsy results released

2:44 PM, Feb 18, 2013   |    comments
Alyssa Byrne. (Photo: Alyssa Byrne Missing Facebook page)
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EL DORADO COUNTY, CA - Autopsy and toxicology results were released Monday for a 19-year-old Petaluma teen whose body was found in a Tahoe area snowbank several days after she was reported missing.

Alyssa Byrne succumbed to probable hypothermia from extended environmental exposure, according to the El Dorado County Sheriff's Office. Other findings included methamphetamine and multiple psychoactive drugs in her system, said Lt. Pete Van Arnum.

Byrne was reported missing over the New Year's Eve holiday weekend after attending the SnowGlobe Music festival with friends. The last known sighting of her was just before midnight on New Year's Eve. Her body was found Jan. 4 off to the side of Pioneer Trail.

STORY: Body of missing Petaluma teen found at Tahoe

News10/KXTV

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