D.C. Man Sentenced to 21 Years in Prison for Stabbing and Killing a Man Defending a Woman and Her Baby

WASHINGTON - Stephen Herring, 26, of Washington, D.C., was sentenced Friday in the killing of Marcus Thurman in August 2023, announced U.S. Attorney Jeanine Ferris Pirro.

Herring pleaded guilty on November 7, 2025, in the Superior Court of the District of Columbia to one count of second-degree murder while armed. On March 6, 2026, the Honorable Judge Danya Dayson sentenced Herring to the prison term to be followed by five years of supervised release.

According to the government's evidence, at approximately 5:10 am, on August 22, 2023, Metropolitan Police Department received a call for a stabbing in front of 140 M Street, NE. Upon their arrival, they found the victim, Marcus Thurman, unconscious and unresponsive, suffering from an apparent stab wound to the upper chest. Responding police and medical personnel conducted life saving measures as well as CPR on the scene. The victim was transported to Washington Hospital Center where on September 4, 2023, he died from his injuries.

On the day of the incident the defendant was involved in an altercation with a female victim that led to the defendant physically assaulting the victim. Upon seeing this, Thurman tried to intervene and protect the female victim. The female victim was also with her infant son who was in a baby stroller nearby. The defendant-obviously unhappy and enraged by Marcus' attempt to protect the young woman-left the area and returned to the scene shortly thereafter armed with a knife. Surveillance video captured the defendant stabbing the victim and multiple eyewitnesses on the scene identified Stephen Herring as a suspect. Herring fled the scene shortly after the attack.

Joining in the announcement was Interim Chief Jeffery Carroll of the Metropolitan Police Department.

In announcing the sentence, U.S. Attorney Pirro and Interim Chief Carroll commended the work of those who investigated the case from the Metropolitan Police Department. They also thanked Assistant U.S. Attorney Nebiyu Feleke, who prosecuted the case.

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