SAN ANTONIO (AP) — Investigators say an Air Force major in San Antonio bought a shovel, an ax, gasoline and a “burn barrel” a day after his wife was reported missing and then tried to destroy the receipt.

The San Antonio Express-News reports that 40-year-old Andre McDonald was indicted Sunday on a charge of tampering with or fabricating evidence in connection to the disappearance of his 29-year-old wife, Andreen McDonald, who police believe is dead.

Bexar County Sheriff Javier Salazar says friends reported Andreen McDonald missing Friday and her husband purchased the materials Saturday morning.

Investigators believe McDonald intended to use the items to dispose of his wife’s body.

Salazar says deputies have been searching wooded areas in North Bexar County for Andreen McDonald. He encourages anyone with information on her whereabouts to contact the department.