Police and prosecutors documented a rapid chain of events before Mary Spears was killed, followed by an 11-month path to trial.
ARLINGTON, Texas — Frederick Spears’ capital murder conviction came nearly 11 months after Mary Spears was killed, but the central events described by police and prosecutors unfolded during five days in September 2025, beginning with a domestic disturbance and ending with his arrest following a manhunt.
A Tarrant County jury completed the criminal case on Aug. 19, 2026, finding Spears, 57, guilty after only 17 minutes of deliberation. He was automatically sentenced to life in prison without parole. The verdict gave a legal endpoint to a chronology that Arlington police began documenting Sept. 17, 2025. Their records, later supplemented by prosecutors at trial, trace Frederick Spears from an earlier family violence arrest to his release on bond, an improper police ride, the purchase of items prosecutors viewed as evidence of planning, Mary’s death and Spears’ capture the following day.
Sept. 17 was the first critical date. Arlington officers responded to Mary Spears’ house after a report of a domestic disturbance. Police said Frederick Spears argued with another member of the family, grabbed two kitchen knives and threatened the relative. Officers arrested him and booked him into city jail on one count of aggravated assault family violence. Mary’s son, Ashton Spears, later shared Ring camera footage with news organizations that showed part of the confrontation. Local reporting identified Ashton as Frederick’s stepson and said the video showed Frederick holding knives during the dispute.
The next day, Sept. 18, Spears posted bond and was released. Authorities issued an emergency protective order barring him from Mary’s home and prohibiting contact with her and other family members. Despite that order, police said Spears went to the Ott Cribbs Public Safety Center immediately after leaving jail and asked an officer to take him to the house so he could get his vehicle. An officer arranged the trip. Once there, Spears became involved in another verbal argument with relatives. The transporting officer told him to leave, and he did. Arlington police later acknowledged that officers should not have provided the ride.
The public record then moves from the protective-order issue to the preparations prosecutors described at trial. The Tarrant County District Attorney’s Office said Spears bought a knife and saw kit after the earlier arrest and before Mary’s death. Assistant District Attorney Chase Payne used the phrase “murder kit” for those purchases in presenting the state’s case. Early on Sept. 22, authorities said Spears returned to Mary’s property. Prosecutors said he positioned himself near the side of the house in the backyard and waited for her to come outside.
Mary Spears, 53, eventually stepped into the yard. Payne told jurors she likely said, “What took you so long?” when she saw her estranged husband. Prosecutors said Spears attacked her and that she tried to defend herself. The District Attorney’s Office reported that Mary weighed 83 pounds. Its post-verdict account said Spears repeatedly stabbed her and ultimately inflicted a fatal wound. The official description was detailed, but the killing can be stated without graphic elaboration: prosecutors proved to the jury’s satisfaction that Spears intentionally attacked Mary outside her home and killed her.
The next point in the timeline came when a relative began looking for Mary. Arlington police said Frederick Spears had sent a concerning text message to one of her family members that morning. The relative found Mary unresponsive in the backyard and called authorities. Police said officers arrived at about 9 a.m. and found her suffering from multiple stab wounds. She was taken to an area hospital and later pronounced dead. Detectives said they also discovered messages Frederick Spears sent to Mary’s phone and to other people that implicated him in the killing. At the start of the investigation, police said the attack did not appear random.
Investigators moved quickly. Detectives obtained an arrest warrant for Frederick Spears, and the search involved Arlington police, Grand Prairie police and the U.S. Marshals North Texas Fugitive Task Force. On Sept. 23, officers located him in the 1600 block of North Davis Drive, behind a church in Arlington. Police said Spears produced a knife and began stabbing himself as officers approached. He refused repeated orders to drop it. Officers deployed Tasers and less-lethal rounds and used a Grand Prairie police dog before Spears dropped the knife. Prosecutors later said he had also tried to stab the K-9. He was taken to a hospital for treatment before being placed under arrest.
As investigators built the homicide case, Arlington police also confronted the decision their own officers had made five days earlier. The department said in a Sept. 24 news release that officers should not have arranged Spears’ transportation to Mary’s house after his release. It announced a comprehensive administrative review to examine whether policy or procedure changes were required. That issue was separate from the evidence proving the homicide charge, but it became an important part of the broader story because the department’s records showed that Spears had been under an order to stay away from the same location.
Family accounts added another dimension to the chronology. Ashton Spears told local reporters that the Sept. 17 confrontation was not an isolated source of fear. He said the family had lived with Frederick’s violent behavior for years and described his mother as frightened that Frederick could kill her. Prosecutors later made a similar point at trial, telling jurors that Frederick had threatened Mary over a period of years. Assistant District Attorney Allenna Bangs said he had repeatedly told Mary he would kill her. The prosecution used that history together with the recent arrest, purchases and return to the property to describe a deliberate killing.
The investigation eventually became a capital murder prosecution, though the official reports reviewed here do not provide a detailed account of each pretrial hearing or the defense’s full strategy. What is clear from the final court result is that Tarrant County Assistant District Attorneys Chase Payne and Allenna Bangs presented the state’s case to a jury in August 2026. Payne asked jurors to return a capital murder verdict. They did so after 17 minutes. District Attorney Phil Sorrells emphasized the speed of the decision when his office announced the conviction.
The sentence followed automatically: life in prison without parole. The trial thus closed the most consequential part of the timeline that began with the Sept. 17 family disturbance. Within that brief initial span, Spears had been arrested, released, placed under a protective order, taken back to the restricted property by police, and accused of returning days later to kill Mary. Within a day of her death, he was back in custody. Eleven months later, a jury converted the accusation into a conviction.
Mary’s family has tried to preserve a record of her life beyond those dates. Ashton described his mother as devoted to her three children and said he wanted her remembered as a kind and loving person. As of the latest materials reviewed for this report, Frederick Spears remains convicted of capital murder and sentenced to life without parole. No later court ruling changing the judgment was identified.
Author note: Last updated September 28, 2026.