Investigative genetic genealogy helped identify Mayra Velasquez, 42, as the suspect in Irasema Chavez’s 2012 stabbing death in the Arlington cold case.
Source: [NBC News](https://www.nbcnews.com/news/us-news/irasema-chavez-cold-case-dna-leads-arrest-mayra-velasquez-2012-texas-m-rcna588777)