On January 20, 2012, Irasema Chávez was found stabbed over one hundred times in her Arlington, Texas apartment. For fourteen years, that room held nothing but silence. Then, on July 17, 2026, Mayra Velázquez was arrested—her DNA matched through genetic genealogy after the trail had gone cold. The arrest is a fact; the closure remains incomplete.
The Chávez case is neither the oldest nor the only crime where evidence has been the slowest witness. On June 23, 2026, Lautaro Servín, 17, was killed in Almirante Brown while defending his father during a robbery. Two suspects, also 17, were arrested within weeks. The speed of that arrest contrasts sharply with the decade-plus wait in Arlington. Both cases share a victim-centered brutality—a young man protecting his father, a woman killed by a friend—yet the evidentiary paths diverged radically. In Lautaro’s case, eyewitnesses and immediate police work produced swift arrests. In Chávez’s case, only DNA persistence and genealogical databases broke the impasse.
But speed does not always equal certainty. The sentencing of a priest in Tijuana to 21 years for aggravated sexual assault of a nun during confession came after a trial that relied on victim testimony and Article 179 of the state penal code. The assaults happened during an appointment meant to be sacred—an institutional setting that made evidence collection difficult. The conviction is an editorial judgment of the court; the victim’s account was central. Here, the evidence gap was closed not by new science but by the courage of one person to speak.
Then there is the Plus Ultra case. The airline received a €53 million public rescue loan during the pandemic. Its president and CEO, Julio Martínez Sola and Roberto Roselli, resigned while under investigation and have been called to testify before Judge José Luis. No charges have been filed. The evidence gap remains open—allegations of misuse, but no determination of criminality. This is the unresolved question that matters most: why is it that some crimes yield arrests and convictions within months or decades, while others stall at the stage of resignation and testimony? Is it the nature of the evidence—