A Petaluma woman who was in the South Lake Tahoe area for a music festival has been missing since New Year's Eve, her family said.
Alyssa Byrne, 19, was last seen at about 12:30 a.m. Tuesday by friends at the Horizon Casino Resort in Stateline, Nev., Douglas County sheriff's officials said in a statement.
Byrne had been in the area since Saturday for the SnowGlobe Music Festival on the Lake Tahoe Community College campus in South Lake Tahoe, said her mother, Kim Miller-Byrne of Petaluma.
Byrne took a shuttle from the concert to the casino-resort about 4 miles away in Stateline. But Byrne didn't return to the shared room and didn't show up for a ride home the next day, Miller-Byrne said.
"They called the hospitals, the police, the sheriff's department, and they couldn't find her," Miller-Byrne said.
Byrne's friends filed a missing-person report with South Lake Tahoe police, and police handed the case to the Douglas County Sheriff's Office in neighboring Nevada.
Between Saturday and Monday, she had touched base with her family each day, they said.
"She doesn't do this at all, and she's very reliable," Miller-Byrne said. "She was texting (with me) every day."
Byrne's cellphone was last used Monday in the city of South Lake Tahoe, according to a Sheriff's Office statement.
Surveillance images at the casino didn't offer police any clues, according to Miller-Byrne.