When Aaron Schaffhausen pleaded guilty to killing his three daughters, he told prosecutors that he was not sane at the time of the killing; however, the psychiatrist hired by prosecution testified Monday saying that Schaffhausen was legally sane at the time of the killing, according to news sources.
The psychiatrist, Erik Knudson told prosecutors that he had a very strong medical opinion that Schaffhausen's depression was not the cause of the death of11-year-old Amara, 8-year-old Sophie and 5-year-old Cecilia, according to the Pioneer Press.
Schaffhausen left his North Dakota home and deceived his ex-wife Jessica in order to visit the girls in their River Falls, WI. home. Contrary to other reports, Shcaffhausen told Knudson that he hadn't threatened Jessica to kill the girls before, according to the Star Tribune.
Knudson said that he talked to Schaffhausen and reviewed evidence for 6 1/2 hours which is longer than the normal amount of time because Schaffhausen seemed to give rehearsed answers and sometimes became "tedious" to work with, reported the Star Tribune.
Schaffhausen's defense continues to argue that he was not in his right state of mind during the killings, according to the Pioneer Press.