RANSOM, Ill. (CBS) – No one has seen Tanya Shannon for almost two weeks. She vanished following a fatal crash near Ransom that killed her husband. Her footprints led away from their wrecked car. She’d left a holiday party wearing a red dress. As CBS 2’s Mike Parker reports, authorities admit they’re clueless.

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The LaSalle County Sheriff worries about the oncoming snow. It won’t make things any easier in the investigation into the disappearance of 40-year-old Tanya Shannon.

“Things have not progressed quite honestly, hardly at all,” said LaSalle County Sheriff Tom Templeton.

Tanya and her husband, Dale Shannon, were driving home from a Christmas party when their car spun off County Highway 6. Dale was killed. It appears his wife left the car and walked away.

Scores of searchers combed the snowy fields and ditches for miles around and found no trace of her.

“Most investigations, even planned crimes, there’s evidence that’s left behind,” said Templeton. “And here we have a crash site, and that’s all.”

Dale And Tanya Shannon: Car Crash

Dale Shannon was killed in a car crash over the weekend, and his wife, Tanya, is still missing. (Credit: LaSalle County Sheriff's Office)

The crash site and a few footprints in the snow.

The sheriff says four investigators continue to work the case, putting in long days and short nights. They have, he says, been tireless, and still no progress.

And the family waits.

“I can’t even imagine what it must be like to be those children who lost their father certainly, and possibly their mother, especially this time of year,” said Templeton.

It is possible that somebody out there has seen something or knows something that might help investigators solve this perplexing mystery. It may seem trivial to you, but authorities want to hear about it.

The Shannons have four daughters – ages 4, 7, 10 and 15.

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