Updated

The ex-Tennessee school teacher accused of kidnapping a 15-year-old student is being sued for divorce by his wife of 31 years.

Jill Cummins filed the divorce petition against Tad Cummins, 50, in Tennessee, WHNT-TV reported Friday.

She cites irreconcilable differences in the court filing, the station reported. She also accuses Cummins of inappropriate marital conduct.

Cummins, 50 and the girl, Elizabeth Thomas, were reported missing on March 13 from Culleoka, a Tennessee community about 60 miles south of Nashville. Police have issued an Amber alert for Thomas and say they have warrants charging Cummins with sexual contact with a minor and aggravated kidnapping.

Jill Cummins says in court papers that she married her husband in July 1985 and that she has not spoken to him since the day he and Elizabeth disappeared.

The Tennessee Bureau of Investigation said Friday that surveillance images obtained from a Walmart in Oklahoma City, Okla., show Cummins and Elizabeth purchasing food items in the store with cash.

The statement says the images captured on March 15 show Cummins had altered his hair to appear darker and Thomas may have changed her hair color to red.

Cummins is Elizabeth’s former health teacher. He was fired following an investigation into allegations of inappropriate contact with the girl.

The Associated Press contributed to this report.