A 47-year-old woman found dead on a snowmobile trail was murdered, Vilas County Chief Deputy Patrick Schmidt said Thursday.

The partially clothed body of Luann Beckman was discovered Tuesday afternoon by some people out for a walk. Investigators are "fairly confident" she was killed Sunday night, Schmidt said.

"We know how she died now. The big hurdle is why and by whom," he said in a telephone interview from Eagle River.

Beckman was seen bicycling in Phelps around 4:30 p.m. Sunday, but few other details about her have been released by investigators...

"She wasn't fully clothed," Stevens told the TV station. "She had a few bags that were scattered up the hill, and all the stuff was ripped out of them and scattered all over the hill and the trail and her purse."