Authorities say a California teen who was found dead in South Lake Tahoe after going missing appears to have taken off her ski jacket and become disoriented while walking. Nineteen-year-old Alyssa Byrne of Petaluma was found near a snow bank by a utility worker on Friday. Byrne had attended a music festival and may have tried to walk three miles in freezing weather to her hotel in Stateline, Nev. El Dorado County Sheriff’s Lt. Pete Van Arnum told the Press Democrat of Santa Rosa (http://bit.ly/Zmt4P3) in a story Monday that Byrne’s boot prints suggested disorientation. Authorities do not suspect foul …