The main antagonist in The Great Spontini
Slater is a heartless, Egocentric, shark of an attorney. He's takes great joy and pleasure in cruelly using his expertise to destroy a person in court and decimate them in any way possible. His only love is for himself and he's an expert in emotional manipulation.
After Sam triumphs over him, Slater spitefully throws his engagement ring away and storms out. Soon he would lose his job and all credibility.