Jurors deliberated for 17 minutes before finding Frederick Spears guilty of capital murder in Mary Spears’ 2025 death.

FORT WORTH, Texas — A Tarrant County jury took just 17 minutes to convict Frederick Spears of capital murder in the killing of his estranged wife, Mary Spears, closing a case prosecutors said involved years of threats, a protective order and a planned return to the Arlington home where she was killed.

The Aug. 19 verdict brought an automatic sentence of life in prison without parole for Spears, 57, according to the Tarrant County District Attorney’s Office. Mary Spears was 53 when she was killed Sept. 22, 2025. Prosecutors told jurors that Frederick Spears bought a knife and saw kit before going back to the house early that morning. Assistant District Attorney Chase Payne called those purchases a “murder kit” during the case. Authorities said Spears waited near the side of the house in the backyard until Mary came outside and then attacked her. The county’s announcement said the sentence followed immediately from the capital murder conviction.

The speed of the verdict became one of the most striking details of the trial’s conclusion, but prosecutors had presented a case that reached back several days before the killing. The District Attorney’s Office said Spears had recently been arrested after threatening a family member with kitchen knives. Arlington police records show officers were called to Mary Spears’ home Sept. 17, 2025, for a domestic disturbance. Police said Frederick Spears argued with another family member, grabbed two kitchen knives and threatened that person. Officers arrested him and booked him into the Arlington City Jail on a charge of aggravated assault family violence. He posted bond the following day.

His release came with a restriction that would later become a major part of the public scrutiny surrounding the case. Police said an emergency protective order barred Spears from returning to Mary Spears’ home or contacting her and other family members. Yet immediately after leaving jail Sept. 18, Spears went to the lobby of the Ott Cribbs Public Safety Center and asked for a ride to the house so he could retrieve his vehicle. An officer arranged for another Arlington officer to take him there. Police said Spears got into a verbal argument with family members after arriving, and the officer told him to leave. He complied. The department later publicly acknowledged that its officers should not have arranged the transportation.

Four days after Spears bonded out, Mary Spears was killed. Prosecutors said Frederick Spears returned to the Arlington property early Sept. 22 after buying the knife and saw kit. According to the District Attorney’s Office, he waited in the backyard near the side of the home until Mary stepped outside. Payne told jurors that she likely asked, “What took you so long?” when she saw him. Prosecutors said she tried to defend herself before Spears repeatedly stabbed her. Mary’s son later found her unresponsive in the backyard. Arlington police said officers were called at about 9 a.m., and Mary was taken to a hospital, where she was pronounced dead from her injuries.

The prosecution also pointed jurors to what it described as a history of threats. Assistant District Attorney Allenna Bangs told the jury that Spears had for years threatened to kill Mary. The District Attorney’s Office quoted Bangs as saying after the verdict that Mary had been left for dead. Prosecutors presented the earlier domestic disturbance, the protective order, the purchases and Spears’ return to the house as parts of the sequence leading to the killing. The publicly available reports reviewed for this story do not provide a similarly detailed account of the defense presentation at trial, so the defense’s full theory of the case could not be independently described from those materials.

Investigators also relied on communications sent on the morning Mary was found. Arlington police said Frederick Spears sent a concerning text message to one of her family members. That person went looking for Mary and found her unresponsive outside. Detectives later said they uncovered additional messages sent to Mary’s phone and to other people that implicated Frederick Spears in her death. Police had initially said the circumstances did not appear to involve a random attack and that the victim likely knew whoever was responsible. By the next day, homicide detectives had obtained a warrant for Spears’ arrest.

The effort to take Spears into custody ended behind a church in Arlington. Police said officers from Arlington and Grand Prairie, along with members of the U.S. Marshals North Texas Fugitive Task Force, located him Sept. 23 in the 1600 block of North Davis Drive. According to police, Spears retrieved a knife and began stabbing himself as officers approached, then ignored repeated commands to drop it. Officers used Tasers, less-lethal rounds and a police dog before he surrendered the knife. Prosecutors later said he also attempted to stab the police K-9. Spears was hospitalized for treatment before being taken into custody.

The killing left Mary Spears’ family grieving while questions mounted about the events before her death. Her son, Ashton Spears, told local reporters in 2025 that his mother was a loving and devoted parent. He described a long period of fear and violence in the family and said Mary had been worried that Frederick Spears would kill her. Ashton also shared video from the Sept. 17 confrontation with news organizations. The recording showed Frederick Spears holding knives during the incident that led to his arrest, according to CBS Texas. Ashton told reporters he wanted his mother remembered for her kindness and for the life she built around her children rather than solely for the circumstances of her death.

The police department’s own response to its role before the killing became a separate part of the case’s public record. In its Sept. 24, 2025, statement, Arlington police said the officers should not have driven Spears back to the property after his release. The department announced a comprehensive administrative review to determine whether policies or procedures needed to change so that a similar situation would not happen again. The reviewed public materials establish that the review was opened, but they do not provide a final finding from that process. The ride did not occur on the day Mary was killed; it happened Sept. 18, four days before her death.

By the time the case reached a jury nearly 11 months later, Spears was no longer merely accused in the killing. Tarrant County Assistant District Attorneys Chase Payne and Allenna Bangs prosecuted the capital murder case, and Payne urged jurors to find Spears guilty of that charge. District Attorney Phil Sorrells said the jury returned its verdict after 17 minutes of deliberation. Because the conviction carried an automatic life sentence without parole, there was no separate punishment decision for jurors to make. The sources reviewed for this report did not announce any post-trial ruling or later change to the sentence.

For Mary Spears’ family, the verdict ended the trial but not the consequences of the killing. She left three children, according to family accounts published after her death. Ashton Spears said his mother had taught him to be respectful and guided much of his life. The criminal case now stands with Frederick Spears convicted of capital murder and sentenced to life without the possibility of parole. No subsequent development identified in the sources reviewed for this report has altered that judgment.

Author note: Last updated September 28, 2026.