COTTON COUNTY, Oklahoma - Authorities are looking for a Cotton County woman who has been missing since Saturday, January 7, 2012.

Teresa Speir, 52, works at the "EZ Go" truck stop near Interstate 44 and Walters Exit, and was last seen when her shift ended Saturday evening. Her manager became worried about her when she did not show up for work Sunday, and contacted her family.

The Cotton County Sheriff's Office has requested the Oklahoma State Bureau of Investigation's assistance in this case. According to the OSBI, law enforcement officials went to Speir's home near Devol and found a scene that concerned them about her safety. Officials said Speir's vehicle was found at her home.

Authorities then searched more than 500 acres of land in the area. OSBI agents also collected possible evidence at Speir's home, and interviewed her co-workers and friends for leads.

Anyone who has seen or heard from Speir since 11 p.m. Saturday should contact the OSBI at (800)-522-8017.