In italics below are excerpts from a report on Parkland, FL's high school mass murderer, Nikolas Cruz. He was apprehended and charged with murdering 17 people and injuring 17 others. (It's the case that spawned kids from the same high school to demand gun bans, most notably David Hogg, who's been busy taking selfies & running around tv while the dead still hadn't been buried, emoting and demanding things from the grown ups he refuses to respect. In contrast and of note, the other well known student Kyle Kashuv, who is very respectful and far less emotionally driven than Hogg.)
In one April 2014 session, the therapist discussed Cruz’s “aggressive behavior at home due to his not getting his way.” Cruz responded by saying that he saw the therapist as a threat. The therapist noted that Cruz was “very paranoid.”
This man has spiritual issues that manifest themselves, as all spiritual things eventually do, whether good or bad, in behavior. He is enslaved to his sin. And while drugs can temporarily change his outward behavior, it can't change his heart and nature. The only way to do that is to repent of his sins and turn to the biblical Christ Jesus for salvation and forgiveness of his sins. In Christ, a person is given a new heart with a new mind and a new will. The fruit in one's life begins to demonstrate that change and it is lasting change sine the Holy Spirit not only have given a new heart and mind to the person, but also indwells that person to help them in their sanctification.
The world offers confusion and dark, lifeless, demonically inspired theories that are useless and foolish.
Joh 8:34 Jesus answered them, "Truly, truly, I say to you, everyone who commits sin is the slave of sin.