Sandra Plunkett confessed to killing her husband, former Jefferson City police officer Paul Plunkett, according to a police probable-cause statement.
Plunkett was shot in the back of his head at their home on New Year's Day. His wife, Sandra, called police, saying she saw a man walking down their street, wearing camouflage and holding a gun. She said she went into the house and found her husband on the floor.
Sandra Plunkett was charged with first-degree murder on Tuesday night. The probable-cause statement shows that she was arrested about 10 p.m. Monday after confessing during an interrogation.
"Sandra Plunkett admitted that she shot her husband, Paul Plunkett, in the head with a rifle," the statement said.
Police have not suggested a motive for the killing.
Plunkett is being held in the Callaway County Jail.