In July 2011, Jacque Sue Waller's sister, Cheryl Brenneke, told TODAY's Amy Robach about the search for her sister.

The remains of Jacque Sue Waller, a Missouri mother of triplets whose disappearance set off a statewide search, have been discovered almost two years to the day since she vanished, authorities said Thursday.

Waller, then 39, of Ste. Genevieve, south of St. Louis, was last seen June 1, 2011, after meeting with her husband, Clay, as they were planning their divorce, NBC station KSDK of St. Louis reported.

Her body was found Wednesday, the Cape Girardeau County prosecutor's office said in a statement.

Authorities wouldn't say where the body was found.

Clay Waller is facing trial on first-degree murder charges in September after he told his father that he had killed his wife and dumped her body in a hole, federal prosecutors alleged.

He is already serving five years in prison after having pleaded guilty in October 2011 to threatening Jacque Sue Waller's sister, who has custody of their three 7-year-old children.

An attorney for Clay Waller wouldn't comment.

On a Facebook page devoted to Waller's case, her family said:

"God has planned everything well to place us in this very moment. God guided the law enforcement officials, searchers, K9s and most of all the prayers being sent to the prison to weigh heavily on Clay's mind. We thank everyone of you who has supported us and assisted us in this terrible nightmare. ... God Bless you all!"