I found CP on my brother’s computer what do I do

I am still rly in shock rn but basically he’s at his swim practice rn n I went to his room to put his laundry on his bed n saw a TODDLER’s puh on his taco-ed computer. I was shocked so I opened it and saw that he has tons of tabs on which are like cp websites on the onion looking purple thing and some individual videos and they r all I’d estimate 6-8 year olds getting graped. The thing is we js got our green card n I heard if the police gets involved our whole family gets deported, but at the same time I doubt my parents would actually do anything that makes him change cuz they r not professional psychologists nor would they even believe it at the first place. My parents r very proud of my brother he plays sports, plays piano and has super good grades so they never take anything I say abt him seriously