George S. Moore, a 37-year-old man from Edgewood, Maryland, was killed on June 2, 2014, inside the home he shared with Tanasha Siena. That evening, deputies were sent to a residence on Mahonia Way after Siena called 911 and reported that she had shot Moore during what she described as a domestic altercation, saying he had assaulted her. When law enforcement arrived, Moore was found in a second-floor bedroom with gunshot wounds to his head and upper body, and he was pronounced dead at the scene.
In the first hours after the shooting, Siena was taken for medical evaluation and treated for what authorities described as minor injuries, while detectives began documenting what they could from her condition and the scene. Investigators would later describe swelling above her right eye that was photographed at the hospital, and a crime-scene detective testified that the bedroom did not appear to show clear signs of a struggle in the way one might expect if a violent fight had unfolded there, even though the house itself was described as somewhat unkempt. That night, the call and the body in the upstairs bedroom quickly turned the home into a sealed-off crime scene, with the story of what happened narrowing to the two people who had been inside it.
Siena was arrested and charged, with authorities initially lodging counts that included first- and second-degree murder, as well as assault and the use of a handgun in the commission of a felony. In the charging narrative reported at the time, the central question was whether this was an act of self-defense, as Siena claimed, or a deliberate killing. She was held without bond while the case moved forward.
As the case headed to trial, prosecutors advanced a motive that reached beyond the walls of the Edgewood house. Testimony described Moore's romantic relationship with another woman, Sophia Thompson, and a May 2014 confrontation in which Siena allegedly drove to Thompson's apartment, held down the buzzer while screaming, and shouted insults through the intercom as Moore came downstairs—an episode used to paint jealousy and anger as the fuse that had already been burning weeks before the shooting. In court, Siena maintained that the final argument on June 2 escalated rapidly after she returned home with the children and Moore came back less than an hour later, with the dispute turning physical and ending in gunfire.
Trial began in April 2015, and the jury rejected Siena's self-defense claim. She was found guilty of second-degree murder and the unlawful use of a firearm/handgun in the commission of a felony or crime of violence. On July 2, 2015, the court imposed consecutive sentences totaling 50 years—30 years for second-degree murder followed by 20 years for the firearm offense—locking in the legal conclusion that Moore's death was not justified.
Siena appealed, arguing that the trial court made errors affecting what the jury was allowed to hear and how the proceedings were handled. In September 2017, Maryland's appellate court affirmed the circuit court's judgment, leaving her convictions and sentence in place and closing the door on the main challenge to the verdict.
