Connection between steroid use and tragic events

Oscar Pistorius admitted that he had killed his girlfriend Reeva Steenkamp. But the athlete stated that he had killed her because he had mistaken her for a thief.
Police officers try to determine why the Olympic athlete really murdered Reeva Steenkamp. They found steroids at the athlete’s home.
Since steroids have been found in Oscar’s bedroom, it would be probably stated that steroids caused uncontrolled behavior in the athlete. Steroids would be demonized for the murder.
In fact, you should understand that it is quite hardly to claim that anabolic steroids are responsible for aggression and violence. Researches linked with this issue are quite limited. According to results of several researches, steroid users are predisposed to aggression, paranoia, jealousy, etc. It is stated that those who use steroids are more likely to commit crimes than those who have nothing to do with these medicines. But it is necessary to consider that steroids may only contribute to aggression. Just these medicines alone can’t lead to aggression. They turn out to be just contributive factors. Other factors should be also present for appearing of aggression. Circumstances play essential role in such situations. So, it is even impossible to define whether anabolic steroids cause aggression or several circumstances. Cases should be reviewed as a complex of steroid use and circumstances.
It is also claimed by experts that increased levels of testosterone are associated with aggression in some persons. So, it is necessary to specify here that while some persons with increased testosterone levels suffer from aggression, others with elevated testosterone levels are not predisposed to uncontrolled violent behavior. This condition differs from one person to another.
You can see that the link between usage of steroids and crimes is a complicated issue. Scientists have not studied this condition well enough to implicate it. So, if defense lawyers of the Olympic athlete desire to argue that steroids have made their client to murder his girlfriend, they should recognize that they are going to use controversial statements.