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.

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

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

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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.