Horrific crime: Cooking a baby in a microwave

A father was sentenced to 25 years in prison for badly hurting his daughter in a microwave; yes you read that right - a father actually put his baby girl in a microwave in a hotel and cooked her for 10-20 seconds, causing so much harm that the infant, now in the custody of a foster mother, has spent a prolonger period under treatment. How more horrific can this get ? The father claimed that he was insane at that time, a defense not bought by the jury (given that he first hit his own daughter, put her in a safe and then a refrigerator, before actually putting her in the microwave):

His daughter Ana's foster mother fought back tears as she detailed how after being injured, the girl's left hand was so burned that there was no skin, no muscle, no fat, only tendon and bone. Ana suffered second- and third-degree burns to her left ear, cheek, hand and shoulder and has required several skin grafts. Part of her left ear had to be amputated.
Prosecutors said Mauldin hurt his daughter because he was angry that he was in a loveless marriage and he didn't want to take care of the infant. They also said Mauldin had a history of violence and of lying about being mentally ill to get out of trouble. Cammack said Mauldin has been wracked by mental illness since he was 10. Mauldin claimed he started hallucinating when he was left alone in the hotel room with his daughter, feeling like mud was running up his body and consuming him.

Maybe what the defendant, Joshua Mauldin said was true. How can any sane person actually put his own daughter into a microwave ? You have to be mentally ill to do something like that.