The justices wrote that the man admitted having sex with his 18-year-old client and another woman in exchange for credits toward her $2,300 fee for handling an assault case.
He agreed to take off $200 every time he had sex with her and $400 when she arranged sex with another woman.
The justices also found in other cases he altered evidence, caused a witness to give false testimony, charged excessive fees and stole clients' money.