I'm going to report my brother to the police
What did your brother do to deserve you turning him in to the police?
He insulted my integrity, I feel betrayed.
I know that you feel wounded about what your brother said to you. However, turning him into the police hurts your brother and is not something that they would act on.  Forgive your brother and forget about payback for his mistake to you.
I can call myself a good person as I stood up against him.
There are ways to stand up for yourself without involving the police.  This is not a matter the needs legal intervention