Perry Dampf


James R. "Sonny" Chastain, Jr.

Mr. Chastain is a partner with the law firm of Kean Miller in the Baton Rouge office. He brings over thirty years of legal experience as a litigator handling commercial litigation and intellectual property matters. Mr. Chastain began his career as a law clerk to Judge Frank J. Polozola of the United States District Court in Baton Rouge and has been in private practice since 1990. He has handled federal and state trial and appellate litigation.

Areas of Concentration

Commercial Litigation


Unfair Trade Practices


Intellectual Property, Trademark, Copyright, Trade Secrets


Software Licenses

Property Damage

Products Liability


Construction Disputes

Banking, Consumer Finance, Truth in Lending

Securities, Antitrust, RICO, Investment Suitability and Broker Relations


B.S., Louisiana State University (1986)

J.D., Paul M. Hebert Law Center, Louisiana State University (1989)


Admitted to Bar: Louisiana, 1989; U.S. District Court: Eastern, Middle and Western Districts of Louisiana; U.S. Court of Appeals, Fifth Circuit; United States Supreme Court

Louisiana State Bar Association • Baton Rouge Bar Association • AV rating from Martindale-Hubbell • Member of Wex S. Malone, American Inn of Court, 2012 – Present, Member of Executive Committee and President • Board of Directors, St. Vincent de Paul • Board of Directors, Baton Rouge Community College Foundation • Board of Directors, Brothers of the Sacred Heart Foundation • Board of Directors, Volunteer Baton Rouge • Member, Catholic High School Alumni Advisory Board • Member, Sigma Chi Fraternity Alumni Association • St. Aloysius Church Chorale and Finance Committee • Catholic High School, Law Studies Instructor • V-Tones