My oldest brother was extremely cruel and creative until he was about 16. He was legendary. Then a flip switched and he became calm and law abiding. A model citizen. A couple incidents where I was a bystander are as follows. He tied Jimmy Lee’s bike to our garage. Then he told Jimmy that his mother was calling and it was time to go home. All was fine until Jimmy got to the end of the rope. He kept going, but the bike didn’t. Then there was the time he sat our two year old twin brothers on the step and put Tabasco sauce on their tongues. They howled and my mother freaked.
I was often the subject of his cruelty. He was 4 years older and I didn’t have a defense.
About twenty years ago he drove about 120 miles to visit me and apologize for his reign of terror.