Jurors got their first view of an emotional Aaron Schaffhausen on Wednesday when the video footage of his police interrogation was played in the courtroom.
Schaffhausen briefly broke down in an interview room last July shortly after killing his three daughters in their River Falls, Wis., home.
The three-hour interview was recorded by police on the day of the killings.
During the first two hours, Schaffhausen is silent. In the final hour, he broke down crying as an investigator asked him about tucking the girls into their beds. When investigators asked if police should look for another suspect, he also shook his head and said, "No."
When the interviewer told Schaffhausen he could tell that the father loved his daughter and wanted them to have peace, Schaffhausen put his head down on the table and began to sob.
Later, he is seen on the videotape saying, "I don't know what I want; I don't know what I need. I want my girls back; I want a lot of things. Can you give them to me? Then quit offering the world like you have the keys." He later said, "I need help."
If Schaffhausen is found sane, he could go to prison for life. If the jury finds he was not responsible, he could be committed to a psychiatric institution and possibly be released at some point.
Also on Wednesday, Jessica Schaffhausen took the stand and told jurors that her ex-husband had been taking medication for depression and seemed to be getting better in 2011.
When shown a photograph of the girls, Jessica Schaffhausen began to cry, saying, "They're my babies."
She also testified that after their divorce, Aaron Schaffhausen sometimes called her as many as 30 times in a row.
The couple filed for divorce in August 2011, and Jessica Schaffhausen testified that his depressive state led her to end their marriage, explaining that he would often play video games for eight hours or more was drinking daily. She said he also did not help raise their children or perform household chores.
Aaron Schaffhausen pleaded guilty to the murders of 11-year-old Amara, 8-year-old Sophie and 5-year-old Cecilia; however, he claims he was not responsible due to mental illness.
Information from the Associated Press was used in this report.