Michael R. Casillas Esq. - Frisco, TX

Michael R. Casillas is a Senior Trial Attorney at L and L Law Group, PLLC, with more than three decades of experience representing clients in complex and high-stakes criminal cases. Licensed in Texas since 1991, Michael has built a distinguished career focused on criminal trial and appellate advocacy at both the state and federal levels.

He is Board Certified in both Criminal Law and Criminal Appellate Law by the Texas Board of Legal Specialization — a dual specialization held by only a small percentage of Texas attorneys. The designation reflects advanced expertise, substantial trial and appellate experience, and demonstrated knowledge of criminal procedure tested through peer review, written examination, and case-load substantiation.

Michael earned his Juris Doctor from the University of Texas School of Law and began his legal career within the criminal justice system, building practical insight into both trial and appellate practice. Over the course of his career he has handled a wide range of criminal matters and has experience litigating cases at the trial level and on appeal — including admissions to the United States Supreme Court and the U.S. Court of Appeals for the Fifth Circuit.

His courtroom work pairs methodical case analysis with structured challenge to the State’s evidence and tailored defense strategy aimed at dismissals, favorable resolutions, or trial verdicts. His appellate background strengthens his ability to identify legal issues early, preserve them on the record through written motion practice, and frame them for review — an added layer of protection that often shapes the trial strategy itself.

As Senior Trial Attorney, Michael plays a key leadership role within the firm, contributing to complex case strategy and mentoring trial counsel to ensure consistency in preparation and courtroom execution across the firm’s docket.