Defense attorney for killer uses steroid excuse

Audrey Allen, an 18-month old child, was killed by Joshua Allen Kruzik.
The little girl was killed because she cried in the middle of the night. Joshua Allen Kruzik, an US marine, a friend of Audrey Allen’s parents, came to them to spend weekends at their friends’ home. Before he came to them, he was at a local bar where he drank much alcohol. He had to care about the little girl, when she cried. But Joshua Allen Kruzik beat the little girl too inhumanely. As a result, the little girl got numerous grave head injuries. The baby died at a local hospital.
David Kohn, the defense attorney for Joshua Allen Kruzik, claimed that steroids were responsible for the aggression of his client. It was affirmed that the murderer used anabolic steroids. Before the incident he tried to discontinue applying these medicines but he was not able to do it. David Kohn claimed that anabolic steroids caused “roid rage” in Joshua Allen Kruzik. He couldn’t not control himself and beat the little girl. According to David Kohn, Kruzik was unconscious. Although the defense attorney claimed that Kruzik was ready to take the total responsibility, he added that he was not guilty.
The little girl’s parents also testified that Kruzik used anabolic steroids. The mother of the baby affirmed that she possessed syringes at her home. So, she injected Kruzik with steroids, when he came. Some other individuals also affirmed that he took steroids.
It is strange that anabolic steroids are demonized in this situation. Are these medicines responsible for the crime? Take into account that Joshua Allen Kruzik has been drunk, when he has beat the little girl!
It is not clear whether this defense strategy will work.