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Benoit who murdered his family.

To be fair to Benoit, tests conducted his suicide showed that Benoît's brain was that of a 85 year old dementia patient.

Neuroscientist and former wrestler Christopher Nowinski argued that Benoit may have been suffering from repeated, untreated concussions throughout his wrestling career, ultimately leading to an unstable mental state. Nowinski was quoted as saying that Benoit "was one of the only guys who would take a chair shot to the back of the head ... which is stupid". Tests conducted on Benoit's brain by Julian Bailes, the head of neurosurgery at West Virginia University (WVU), showed "Benoit's brain was so severely damaged it resembled the brain of an 85-year-old Alzheimer's patient". Other tests conducted on Benoit's brain tissue revealed severe chronic traumatic encephalopathy (CTE), and damage to all four lobes of the brain and brain stem. Bailes and his colleagues concluded that repeated concussions can lead to dementia, which can contribute to severe behavioural problems. Benoit's father said that brain damage may have been the leading cause of the murder-suicide. A statement released by WWE described the findings as "speculative".

Source: https://en.wikipedia.org/wiki/Chris_Benoit_double-murder_and_suicide#Possible_motives