State fire investigators and Fairfield police are investigating the domestic violence incident.

Luc Tieman initially told police that his wife disappeared from his pickup truck outside Wal-Mart in Skowhegan. Her body was found Sept. 20.

Valerie Tieman’s body was found in a shallow grave in the woods, on top of chips, a bottle of perfume and a note that ‘reportedly has an apologetic tone,’ the autopsy report says.

A family funeral will be held in South Carolina, while friends plan to gather at a memorial Sunday in Fairfield.

But her husband, now charged with murder, told police she died of a drug overdose, the court document says. Meanwhile, an ex-wife says she ‘was afraid of this outcome’ when she learned Valerie Tieman had disappeared.

A friend says she told Valerie Tieman on Aug. 25 that Luc Tieman had been unfaithful, and he told police his wife vanished from a store parking lot five days later.