Stephen Herring, a 26-year-old resident of Washington, D.C., was sentenced on March 6 to 21 years in prison for the killing of Marcus Thurman in August 2023, according to an announcement made by U.S. Attorney Jeanine Ferris Pirro on Mar. 9.
The case highlights the consequences of violent acts and the legal response when a bystander intervenes to protect others. The sentencing follows Herring’s guilty plea on November 7, 2025, in the Superior Court of the District of Columbia to one count of second-degree murder while armed. Judge Danya Dayson ordered that Herring serve five years of supervised release after his prison term.
According to government evidence, police responded at approximately 5:10 am on August 22, 2023, to a report of a stabbing outside 140 M Street, NE. Officers found Marcus Thurman unconscious with a stab wound to his upper chest. Despite life-saving efforts at the scene and subsequent treatment at Washington Hospital Center, Thurman died from his injuries on September 4, 2023.
Authorities said that before the stabbing, Herring had been involved in an altercation with a woman whom he physically assaulted. Thurman attempted to intervene and protect her; she was accompanied by her infant son in a stroller nearby. Herring left but soon returned with a knife and stabbed Thurman—a sequence captured by surveillance video and corroborated by eyewitnesses who identified Herring as the suspect. He fled shortly after the attack.
Interim Chief Jeffery Carroll of the Metropolitan Police Department joined Pirro in announcing the sentence and commended investigators from the department as well as Assistant U.S. Attorney Nebiyu Feleke for prosecuting the case.
The outcome underscores law enforcement’s commitment to addressing violent crime and supporting those who step forward to defend others.
