My brother was taken down town from his job and questioned but later released for changing prices

Your post is confusing. Do you mean he was taken by the police for theft of some kind? What does 'changing prices' have to do with it?

As I gather, your brother works in a store and was questioned by the police. He was questioned about whether he changed the price marked on goods for sale. Was he suspected to be part of a conspiracy by which other would buy these goods at the altered prices?

And, what is your question?