CHILTON, Wis. -

Authorities in eastern Wisconsin said a teen who was found dead in a backyard last month had been drinking and died from exposure to cold.

The Post-Crescent of Appleton reported said the Calumet County medical examiner ruled the death of 18-year-old Monica Batts accidental.

Batts left a New Holstein home on Feb. 11 about 4 a.m. She crossed a snow-covered field and hopped over a small fence into the backyard of a home. She apparently tried to get inside the home but wasn't able to.

An autopsy concluded that she died of hypothermia. Toxicology tests show she had an elevated blood-alcohol level.