Olympic athlete acknowledged that he had killed his girlfriend

Oscar Pistorius acknowledged that he had murdered his girlfriend Reeva Steenkamp. But the athlete stated that he had murdered her because he had mistaken her for a thief.
Police officers try to define why the sportsman really murdered his girlfriend. They discovered steroids at the athlete’s home.
Since anabolic steroids have been found in Oscar’s bedroom, it would be probably argued that steroids caused uncontrolled aggression in the athlete. Steroids would be blamed for the murder.
Actually, you should recognize that it is quite hardly to claim that anabolic steroids are responsible for aggression and violent behavior. Researches linked with this issue are quite limited. According to results of some researches, steroid users are predisposed to aggression, paranoia, jealousy, etc. It is stated that those who take steroids are more likely to be involved in crimes than those that have nothing to do with these preparations. But it is important to take into account that steroids may only contribute to aggression. Just these preparations alone can’t cause aggression. They turn out to be only contributive factors. Other factors should be also present in order to cause aggression. Circumstances play great role in such situations. So, it is even impossible to determine whether steroids cause aggression or several circumstances. Cases should be viewed as a complex of steroid use and circumstances.
It is also claimed by scientists that enhanced testosterone levels are associated with aggression in certain persons. So, it is important to underline here that while certain individuals with elevated levels of testosterone suffer from aggression, others with enhanced levels of testosterone are not predisposed to uncontrolled aggression. This condition differs from one individual to another.
You can note that the link between application of steroids and violence is a complicated issue. Scientists have not studied this condition well enough to implicate it. Thus, if defense lawyers of the Olympic athlete want to argue that anabolic steroids have made their client to kill his girlfriend, they should recognize that they are going to use controversial affirmations.