Are steroids responsible for shooting of five police officers?

Police officials raided Cullen Mutrie’s house for a steroid investigation. This ma shot five police officials at his home. One of them, the Greenland Police Chief Michael Maloney,  was killed; four police officials were wounded. The next morning Cullen Mutrie and a woman were found dead.
It is suspected that this person was administering anabolic steroids at the time of the shootout. Jane Young, the New Hampshire Associate Attorney General, noticed that toxicology reports were waiting in order to find out whether metabolites of steroids were in the body of Cullen Mutrie.
Police officials reported that Cullen Mutrie had been a very muscular man. This person worked at Genetix Fitness in Seabrook. It was reported that he was 6 feet 3 inches tall. He weighed 275 pounds. During a raid which took place in July 2010 law enforcement officials discovered anabolic steroids at his home. The police official Wayne Young found them in a coffee table. He said that he had noticed a plastic bag with several vials. One vial was with powder; others contained solution. The labels indicated that they were steroids.
The vials were analyzed by the New Hampshire State Crime Lab. It was confirmed that the vials contained such medicines, as Trenbolone Acetate, Sustanon 250, Boldenone Undecylenate and Nandrolone Decanoate.
John Miller, a professor of kinesiology, was asked whether a connection between the deadly actions and aggressiveness due to anabolic steroids could present. The specialist confirmed that it was plausible. But according to him, it is impossible to affirm that there was a direct connection between intake of anabolic steroids and the crime.
John Miller suggested that steroids which were on the black market were provided from legitimate pharmaceutical companies. But he has been mistaken because the majority of steroids that are sold on the black market are manufactured in underground labs. It is even suggested that Mutrie produced steroids.
Since a link between criminal actions and usage of steroids is a controversial question, not only policemen but also correspondents investigate the case linked with Cullen Mutrie.