Law Offices of Sam Lock

Sam H. Lock is a San Antonio criminal defense attorney with more than 25 years of experience representing clients in state and federal cases throughout Texas. Since opening the Law Offices of Sam H. Lock in 2000, he has handled matters ranging from traffic violations and misdemeanors to DWI charges, drug crimes, white-collar offenses, sex crimes, weapons charges, homicide cases, human and alien smuggling allegations, internet crimes, asset forfeiture proceedings, and complex federal prosecutions. He is known for providing hands-on, personalized representation and developing defense strategies tailored to the facts, evidence, and potential consequences of each case.

Mr. Lock earned his undergraduate degree from Texas A&M University and his J.D. from St. Mary’s University School of Law. He has served on the boards of the Texas Criminal Defense Lawyers Association and the San Antonio Criminal Defense Lawyers Association and frequently lectures at continuing legal education seminars. He has been recognized in The Best Lawyers in America® for Criminal Defense: General Practice, Criminal Defense: White-Collar, and DUI/DWI Defense, and was named Best Lawyers® “Lawyer of the Year” in San Antonio for DUI/DWI Defense in 2020 and Criminal Defense: White-Collar in 2022 and 2026.