A Houston-area man and his company filed a negligence and breach of fiduciary duty lawsuit against Thompson & Knight and partner Wilburn McDonald Jr. of Houston, alleging McDonald failed to act in the best interests of a client when inviting him to invest in a Houston company.

In a petition filed in Harris County on Nov. 8, Bill Walls Jr. and BTW Investments LP bring negligence, gross negligence and breach of fiduciary duty causes of action against the defendants and allege they violated the Deceptive Trade Practices Act.