AVA, Mo. (AP) — A second person has been charged in a love triangle killing in southern Missouri.

Thirty-five-year-old Jammie White, of Oldfield, is jailed in Douglas County on a first-degree murder charge in the August stabbing death of her boyfriend, 37-year-old Robert Koch (‘KUK). No attorney is listed for her in online court records.

Investigators say in the probable cause statement that White was having an affair with 28-year-old Cory Walker and knew he was about to kill Koch. Walker was charged earlier with second-degree murder and armed criminal action in the killing.

A detective says White never called 911, and heard the stabbing happening in front of her two children. White also is charged with two counts of endangering the welfare of a child.