Is it ok?

This small dialogue is taken from an old crime drama. Alex is a main character. Alex's father (a famous politician) commited suicide, but Alex thinks that he was killed. Does it sound good? Could you correct, please.

D: - That's what I want to tell you: don't go into this business. A: - Why? D: - Do you realize what a high-ranking man your father was? It was done by professionals. They will crush you like a bug. A: - You knew my father for many years. He could not do it. I am going till the end. D: - Ok, but without me.