03/02/2026
The Gibsons need your help!
The man who murdered Metropolitan Police Department (DC) Master Patrol Officer Brian T. Gibson on February 5, 1997, and received two sentences of life without possibility of parole in 1998 may be RELEASED. Brian’s killer, Marthell Dean, has filed a motion to be released under the Incarceration Reduction Act (IRAA) and Second Look Amendment Act (SLA). Under IRAA, people who were under 18 at the time they committed a crime may be eligible for release if they've served at least 15 years in prison. The SLA expanded eligibility to people who were 24 and under at the time they committed the crime. Marthell Dean was 23 when he chose to go to his car, get a gun, and execute Brian (who was merely sitting in his police cruiser at a stoplight).
Our family is devastated.
The U.S. Attorney’s office is currently putting together a response to the defense’s motion. The defense must prove to a judge that Dean has been rehabilitated and the interest of justice supports his release. However, the judge will take into account statements/opinions from family, friends and coworkers.
Even if you didn’t work with Brian or know him personally, but were impacted by Brian’s murder (or saw how Brian’s murder impacted his parents, sister, wife, and children), you can still send an impact statement to the judge (via the U.S. Attorney’s office). If you knew Shirley (his mother) or Harrison (his father), you can still provide an impact statement. If you know his sister, wife, or children, or any other family members, you can still provide an impact statement. If you are a resident of the D.C. area who was horrified by Brian’s murder, you can still provide a statement. If you are a law enforcement officer, family member of a law enforcement officer, or survivor of a law enforcement officer killed in the line of duty, you can still provide a statement. Anyone can write to the judge and tell them how Brian’s killing affected them (and Brian’s family).
Impact statements are due on March 16, 2026. Please email them to [email protected] with a cc: to [email protected]. They can be addressed “To whom it may concern” or “To the Judge.” You can use the subject line: MPO Brian T. Gibson, MPD, End of Watch 2-5-1997.
There are no restrictions on length; it can be as long or as short as you like. This impact statement is about sharing how this tragedy has impacted you (or how you saw it impact the Gibson family) emotionally, physically, mentally, spiritually, and socially.
I just ask that you use Brian’s name. Make sure to humanize him and his family, friends, and coworkers. Brian is gone forever because of Marthell Dean. You can use words like “murdered, executed, killed, assassinated” in your statement. In many of these motions, the defense talks about “the crime,” which takes away from the fact that a good man was senselessly murdered. That he was first shot in the shoulder, so he had time to realize he had been hit before Dean shot him 3 times in the head and killed him.
Thank you so much for helping the Gibsons with this. Please share this with friends/coworkers. We would like the judge to know what this did to Brian’s family, friends, coworkers, law enforcement, D.C., the country.
With love, Terrica (Brian’s sister)
