If you want to STOP animal cruelty help me and answer?

i need allot of help my big brother has a friend named victor he always comes here to my house. one day my big brother told my mom he was going to give rice to the seagulls raw he gave them RAW rice. im still not sure if he did it but hoping he didn't i don't like him at all should i call the police on him he also has a friend that runs over birds and stuff i will call the police on him