VIDOR, Texas -- Texas authorities are seeking fresh leads in the 1991 death of a woman whose case is seen as an inspiration for the Academy Award-winning film "Three Billboards Outside Ebbing, Missouri."

• Kathy Page worked at a local restaurant in Beaumont
• She was discovered strangled in her car
• She was recently separated from her husband of 13 years

The Texas Department of Public Safety said in a release Tuesday that it has raised the reward to $6,000 for information leading to the arrest of those responsible for the death of 34-year-old Kathy Page.

On Tuesday morning, May 14, 1991, the body of Page was discovered by the Vidor Police Department inside her car. She had been strangled and the vehicle was in a ditch in a staged attempt to conceal the homicide as a car accident. Page was recently separated from her husband of 13 years.

After her death Page's father, James Fulton, rented billboards accusing Vidor police of failing to properly investigate the killing.

The Dallas Morning News reports that in 2000, a civil jury found Page's estranged husband, Steve Page, liable in a wrongful-death suit and awarded her family $150,000.

British-Irish director Martin McDonaugh has said the film was inspired by billboards he saw during U.S. travels decades ago, but hasn't specified exactly where.

To be eligible for the cash rewards, tipsters must provide information to authorities by calling the Crime Stoppers hotline at 1-800-252-TIPS (8477).  All tips are anonymous. Individuals also can submit information through the Texas Ranger cold case website or by calling 1-800-346-3243.