David P. O’Neil

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David P. O’Neil is a 1979 graduate of St. Mary’s School of Law in San Antonio, Texas. He also received an L.L.M. from the United States Army Judge Advocate General (JAG) School. He is a retired United States Marine Corps Lieutenant Colonel who began his military service as an infantry officer. Among other assignments with the Marine Corps he headed a Defense Counsel Service at Camp Lejeune, North Carolina, served as the Marines’ Chief Legal Defense Counsel for Okinawa, Japan, served as the Executive Secretary for the Joint Services Committee on Military Justice, and as the Staff Judge Advocate for Special Operations Pacific Command. Upon his retirement from the Marine Corps O’Neil became the Director of Trial Services for State Counsel for Offenders (the Texas prison public defender system) for five years before joining Bill Habern in 2000 in what is now Habern, O’Neil & Associates. He currently is a Co-Chairman of the TCDLA Corrections & Parole Committee.

Stories from David P. O’Neil

Going to Prison in Texas in 2015, Part 2
Saturday, October 10th, 2015

IV. Some Special Considerations for Women

In the men’s units there are gangs, which we will discuss later. Women have their form of gangs too, but more often women gather together in groups based on relationships.

Going to Prison in Texas in 2015, Part 1
Wednesday, September 16th, 2015


For over 30 years our firm has represented offenders and their families in prison and parole administrative and legal issues. The first version of this article was published in the Voice more than 20 years ago.