75-year-old Alice Uden is accused of killing her ex-husband, Ronald Holtz, in Wyoming in the mid 1970s.
She was arrested with her current husband, Gerald Uden, in Chadwick, Missouri last year.
Gerald Uden was sentenced to life in prison for the murder of his ex-wife and two stepsons over 30 years ago. The Riverton Ranger newspaper reported Uden told the judge he put the bodies in large drums and put them in Fremont Lake in the Wind River Mountains of Wyoming.
Cold case investigators came to Missouri to arrest the pair in November 2013 after finding Alice’s ex-husband's body in an abandoned mineshaft in Wyoming.
According to CBS-affiliate KGWN, the prosecution in Alice Uden’s trial called witnesses to the stand to prove Ronald Holtz was shot in the back of the head while sleeping.
Alice Uden took the stand herself to testify saying she was protecting her daughter.
According to KGWN, Uden gave accounts of abusive behavior against her by Holtz. One day, Uden says, Holtz came home from work and laid down to rest when her 2-year-old daughter began to cry.
"He was very angry and was moving pretty rapidly. He said 'I'm going to kill her'," Uden said. "I tried to stop him and he knocked me down and ran into her bedroom. I was by the mop closet and I had a gun in there and I grabbed it and followed right behind him and shot him in the back of the head," Uden said.
Prosecution continued their cross-examination of Uden on Tuesday. The jury will begin deliberating for a verdict on Wednesday morning.
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