In January 2003, Hardy briefly turned into a heel (villain) after he attacked Van Dam and Shawn Michaels .    It ended a month later when he saved Stacy Keibler from an attack by then-villain, Christian .  In February, he had a brief program with Michaels, which saw the two team up.   Then, in storyline, Hardy began dating Trish Stratus after saving her from Steven Richards and Victoria in March.  Hardy and Stratus had a brief on-screen relationship that saw the duo talking backstage and teaming together in matches. Hardy competed in his final match (his first departure) against The Rock and lost.   Hardy was released from WWE on April 22, 2003.   The reasons given for the release were Hardy's erratic behavior, drug use, refusal to go to rehab, deteriorating ring performance, as well as constant tardiness and no-showing events.   Hardy also cites "burn out" and the need for time off as reasons for leaving WWE. 
The plea agreements also require that Anabolic Resources, Nutrition Distribution and any other continuing entities operated or controlled by Anabolic Resources or Nutrition Distribution not introduce into interstate commerce any products unless and until the monitoring and testing results of that specific lot of product has been received by the FDA from the independent third party testing organization. This monitoring and testing is also separate from, and in addition to, any inspections, sampling, testing or other regulatory actions by FDA which are authorized by statute or regulations.
The second theory is similar and is known as "evolutionary neuroandrogenic (ENA) theory of male aggression".   Testosterone and other androgens have evolved to masculinize a brain in order to be competitive even to the point of risking harm to the person and others. By doing so, individuals with masculinized brains as a result of pre-natal and adult life testosterone and androgens enhance their resource acquiring abilities in order to survive, attract and copulate with mates as much as possible.  The masculinization of the brain is not just mediated by testosterone levels at the adult stage, but also testosterone exposure in the womb as a fetus. Higher pre-natal testosterone indicated by a low digit ratio as well as adult testosterone levels increased risk of fouls or aggression among male players in a soccer game.  Studies have also found higher pre-natal testosterone or lower digit ratio to be correlated with higher aggression in males.