Las Cruces, N.M. (KFOX14/CBS4) — Jurors in the trial of Gustavo Dominguez, the fourth accused shooter in the 2025 Young Park mass shooting, heard detailed testimony about how investigators linked him to the gunfire, including evidence from shell casings and DNA, on Monday. Lt. Peter Bradley of the Las Cruces Police Department’s Criminal Investigations Division testified that the investigation involved more than 80 law enforcement officials.