A 42-year-old Texas real estate agent now faces a capital murder charge in the 2012 stabbing death of a woman once described as her friend, an arrest made possible only after the FBI's genetic genealogy program broke a case that sat dormant for more than a decade.
Arlington police arrested Mayra Velasquez on July 17, 2026, and charged her with capital murder in connection with the killing of Irasema Chavez, a 32-year-old woman found dead inside her apartment on South Collins Street in Arlington, Texas, in January 2012. Investigators say Chavez was stabbed approximately 100 times. The case went nowhere for years after a blood sample recovered from the scene, blood that did not belong to the victim, failed to match anyone in existing DNA databases.
That changed when Arlington detectives turned to the FBI's Investigative Genetic Genealogy program, a tool that combines crime-scene DNA analysis with public genealogy databases and family-tree research. The partnership, which Fox News reported began in November 2024 through the FBI's Dallas Field Office, produced what authorities called a significant lead earlier this year. By April, investigators had identified Velasquez as a potential suspect. By May, police had obtained her DNA from discarded trash, and it matched the blood left at the crime scene.
Fourteen years of dead ends before a DNA breakthrough
When officers first responded to Chavez's home in January 2012, they collected surveillance footage and the blood sample that would eventually crack the case. But without a database match, the investigation stalled. Arlington Police Chief Al Jones told reporters at a news conference that the case sat "stuck in limbo" for roughly 14 years.
In 2016, the department tried a different approach. The New York Post reported that Parabon NanoLabs used DNA phenotyping, a technique that predicts a suspect's physical appearance from genetic markers, to generate a composite image of the likely killer. Even that failed to produce an identification. The suspect remained unknown for another eight years.
Cold case breakthroughs driven by DNA technology have become increasingly common across the country, giving families answers that once seemed permanently out of reach. The Chavez case fits squarely in that pattern: old evidence, new science, and detectives who refused to close the file.
The FBI's IGG program works differently from a standard DNA database search. Instead of looking for an exact match against criminal records, the program cross-references crime-scene DNA with publicly available genealogy databases and historical records. Analysts build family trees from partial genetic matches and narrow the field until they land on a specific individual. In this case, that individual was Velasquez.
Velasquez's own statements gave investigators 'critical' evidence
Once police had the DNA match from the discarded trash, they brought Velasquez in for an interview. Det. Tracy Dixon, the lead homicide detective on the case, told reporters that statements Velasquez made during that interview were critical pieces of evidence. Dixon declined to elaborate on what Velasquez said.
Investigators have not disclosed a motive. Chief Jones said detectives are still working to determine why Chavez was killed. The two women were described as friends, but police have not explained the nature or duration of that relationship.
Attorney information for Velasquez was not immediately available at the time of her arrest. No public statement from her or a defense representative appeared in any of the reporting. It remains unclear whether she has entered a plea.
Other long-dormant murder cases have followed a similar arc in recent years, years of silence broken by a single forensic advance that puts a name to evidence that had been sitting in a lab for a decade or more.
Chief Jones credits detectives who 'never gave up'
At the news conference, Chief Jones praised the work of his department's investigators. ABC News reported his remarks:
"I am extremely proud of the work that our officers and crime scene investigators did on this case. They showed tenacity and dedication and never gave up."
Dixon, the lead detective, broke down in tears when asked about the emotional weight of the 14-year gap and the reaction from Chavez's family when they learned of the arrest.
Dixon told reporters:
"Being able to share that with the family is why we do this work, and they were very grateful."
Velasquez now faces a capital murder charge, one of the most serious charges under Texas law, carrying a potential sentence of life without parole or the death penalty. The case will test whether the evidence assembled over 14 years, anchored by genetic genealogy and whatever Velasquez told investigators, can hold up in court.
Of course, forensic technology is only as reliable as the process behind it. Cases built on other advanced identification tools have occasionally gone sideways when procedures fell short. In this case, Arlington police appear to have built a belt-and-suspenders file: genetic genealogy to find the suspect, a direct DNA match from her own discarded material, and her own statements on the record.
Irasema Chavez was 32 years old when someone ended her life with roughly 100 stab wounds inside her own home. For 14 years, no one answered for it. Good police work and better science finally changed that, and the justice system owes it to Chavez's family to see this one through.
