US marine killed his friends’ baby

Audrey Allen, an 18-month old child, was killed by Joshua Allen Kruzik.
The baby was murdered because she cried in the middle of the night. Joshua Allen Kruzik, an US marine, a friend of Audrey Allen’s parents, was invited to spend weekends at their friends’ home. Before he came to them, he was at a local bar where he consumed much alcohol. He had to care about the baby, when she cried. But Joshua Allen Kruzik beat the child too brutally. As a result, the baby got many serious head injuries. She died at a local hospital.
David Kohn, the defense attorney for the murderer, confirmed that steroids were responsible for the aggression of his client. It was stated that the killer used anabolic steroids. Before the incident he attempted to discontinue administering these medications but he was not capable to do it. David Kohn affirmed that anabolic steroids produced “roid rage” in Joshua Allen Kruzik. He couldn’t not control himself and beat the little child. According to David Kohn, Kruzik was unconscious. However he claimed that his client was ready to take the entire responsibility, he added that he was not guilty.
The victim’s parents also testified that the murderer used anabolic steroids. The mother of the baby confirmed that she had syringes at her home. So, she injected Kruzik with steroids, when he came. Some other individuals also affirmed that he used steroids.
It is strange that anabolic steroids are blamed in this case. Are these medicines responsible for the murder? Consider that Joshua Allen Kruzik has been drunk, when he has beat the child!
It is not clear whether the juries will accept the steroid excuse.