The defense attorney for the woman accused of killing a teacher and businesswoman filed notice Friday that his client will rely on an insanity defense.
Monique Lee, 28, is awaiting trial on first-degree murder charges in the death of her landlord, Karen Jenkins.
Douglas County Attorney Don Kleine said the filing raises the question of whether Lee was sane at the time the crime was committed.
Kleine said the next step is to request an additional examination of Lee at the Lincoln Regional Center.
Last spring, Lee was ruled competent to stand trial, and she has pleaded not guilty.
Her brother, Gary D. Lee, 19, struck a plea bargain earlier this month to testify against his sister and admit that he helped her to kill Jenkins.
He pleaded guilty to second-degree murder and weapon use in Jenkins' death. Gary Lee faces 21 years to life in prison when he is sentenced.
Prosecutors said the two lured Jenkins to an apartment building, where she was struck in the head and strangled.
Monique Lee was being evicted from her apartment at 4503 N. 40th St. and owed Jenkins, 48, about $600 in back rent and late fees.
Jenkins was last seen Oct. 17, 2010.
Her body was found days later near an abandoned house across the street from the apartment where police say she was killed.
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