Steroid user murdered little girl

Audrey Allen, an 18-month old baby, was killed by Joshua Allen Kruzik.
The little girl was murdered 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 little girl, when she cried. But Joshua Allen Kruzik beat the baby too cruelly. As a result, the little girl got multiple serious head injuries. She died at a local hospital.
David Kohn, the defense attorney for the murderer, claimed that steroids were responsible for the abnormal behavior of his client. It was said that the murderer used anabolic steroids. Before the incident he tried to discontinue applying these preparations but he was not able to do it. David Kohn stated that anabolic steroids produced “roid rage” in Joshua Allen Kruzik. He couldn’t not control himself and beat the baby. According to David Kohn, Kruzik was unconscious. However David Kohn confirmed that Kruzik was ready to assume the whole responsibility, he added that he was not guilty.
The little child’s parents also confirmed that the murderer administered anabolic steroids. The mother of the baby said that she had syringes at her home. Thus, she injected Kruzik with steroids, when he came. Certain other persons also claimed that he took steroids.
It is strange that anabolic steroids are blamed in this situation. Are these drugs responsible for the crime? Remember that Kruzen has been drunk, when he has murdered the baby!
It is not clear whether this defense strategy will work.