Toxicology tests were part of an autopsy performed on Aaron Hernandez, the late NFL star who hanged himself in his prison cell on April 19. There was speculation that the former New England Patriots wide receiver may have used K2, a synthetic marijuana, before his death. However, the results of the toxicology tests indicate that Hernandez had no drugs in his system when he committed suicide.

Prison goes on lockdown after Aaron's death

Aaron Hernandez was serving a life sentence for the 2013 murder of Odin Lloyd when a correctional officer found him hanged in his cell at the Souza-Baranowski Correctional Facility in Shirley, Massachusetts.

His death came just one week after he was found not guilty in the Abreu-Furtado double murder case.

After Hernandez was found dead in his prison cell, the prison went on lockdown. The Daily News reports that officials found the synthetic marijuana, otherwise known as K2, and a number of homemade weapons.

The report did not say if any of the weapons or illegal substances were found in Aaron's cell. However, even if he had the drugs in his cell, the toxicology reports indicate that he did not use them before he committed suicide.

Why did prison officials suspect Hernandez used K2?

The Boston Herald reports that inmates at Souza-Baranowski told investigators that they thought Aaron Hernandez may have been high on drugs when he committed suicide.

Kyle Kennedy, who claims that he was close friends with Aaron, told the Herald that he thought K2 may have "played a part" in the former NFL star's death. Now that the toxicology reports have confirmed otherwise, it's clear that Kennedy's assumptions were wrong.

Aaron Hernandez's suicide investigation continues

Hernandez was cremated after a private memorial service on Monday, April 24 in his hometown of Bristol, Connecticut.

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Friends and family — including his fiancee, Shayanna Jenkins-Herandez and the couple's daughter, Avielle — gathered at the O'Brien Funeral Home to say goodbye Hernandez.

As his family continues to grieve the loss of the 27-year-old who was once a star athlete, the investigation surrounding Aaron Hernandez's death continues. Although the coroner's office has officially ruled Aaron's death a suicide, his legal team, led by Attorney Jose Baez, have promised to "determine the truth" about his death.

Hernandez's legal team is also petitioning the court to vacate his murder conviction. The former NFL star could have his record cleared due to an old Massachusetts law that allows for a conviction to be vacated because an appeal was not heard in the courts before he died.