I believe the answer is: <span>person-situation controversy
</span><span>person-situation controversy refers to a debate in the field of psychology which argue whether a person or the situation play a more crucial factor in determining a person's behavior.
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Experts who support the 'person' side in this controversy believed that people with bad personality traits would always do bad behaviors regardless the situation they're in.
Experts who support the 'situation' side in this controversy believed that bad behaviors only occurs because the people are facing bad situations in their life.
There is a possibility that Brian will likely be helped with the use of the deep brain stimulation because using this has helped an individual that has depression or has an obsessive compulsive disorder. This is known to treat physiological disorders that are mentioned to this answer.
He claims that is no threat and should not be killed.