Mark Williams - Private Investigator in Texas

Mr. Williams helps clients uncover the truth with the calm, steady perspective that comes from three decades in law enforcement. As a skilled criminal defense investigator, he knows high-stakes investigations, complex cases, and how to find answers when they matter most.

As a former Assistant Sheriff in Contra Costa County, California, he supervised major investigative, patrol, and special operations units, including SWAT and internal affairs. This experience has given him deep insights into evidence, credibility, and courtroom-ready documentation, which he now applies in his work at CMW Investigation Services.

He has conducted and overseen investigations involving serious crimes, critical incidents, and sensitive personnel matters, bringing the same attention to detail and professionalism to every case he handles as a private investigator in Texas.

Mr. Williams holds a Bachelor of Arts in Management from Saint Mary’s College of California and is a graduate of the POST Command College. He is also credentialed as a California Senior Executive and is a Board-Certified Criminal Defense Investigator, a designation earned through specialized training in defense-focused investigative work.

After retiring from law enforcement in 2020, he returned home to Texas and founded his private investigations firm in 2022. As a proud multi-generation Texan, he understands the local courts, communities, and the expectations of both attorneys and everyday clients.

Every investigation Mr. Williams accepts is guided by his core values of Honor, Integrity, Professionalism, Commitment, Responsiveness, and Transparency. Clients can expect clear communication, honest assessments, and work product designed to stand up to scrutiny.