Did steroid use lead to murder?

Audrey Allen, an 18-month old child, was murdered by Joshua Allen Kruzik.
The baby was killed because she cried in the middle of the night. Joshua Allen Kruzik, an US marine, a friend of Audrey Allen’s parents, decided to spend weekends at their friends’ home. Before he came to their place, he was at a local bar where he drank much alcohol. He had to care about the baby, when she cried. But Joshua Allen Kruzik beat her very brutally. As a result, the little child got multiple grave head injuries. She died at a local hospital.
David Kohn, the defense attorney for the murderer, claimed that steroids were responsible for the aggression of his client. It was affirmed that the murderer applied anabolic steroids. Before the incident he tried to stop using these medications but he couldn’t do it. David Kohn said that anabolic steroids caused “roid rage” in Joshua Allen Kruzik. He couldn’t not control himself and beat the little child. According to the defense attorney, Kruzik was unconscious. Although he said that his client was ready to assume the total responsibility, he added that he was not guilty.
The baby’s parents also testified that Kruzik administered anabolic steroids. The mother of the baby affirmed that she had syringes at her home. Thus, she injected Kruzik with steroids, when he came. Several other persons also affirmed that he took steroids.
It is strange that anabolic steroids are blamed in this situation. Are these medications responsible for the murder? Consider that Kruzen has been drunk, when he has beat the little girl!
It is unclear whether the judge will accept the steroid excuse.