Genaro Isaiah Castillo, an 18-year-old Hispanic male known to his family as “Izzy,” was a student at Donna High School in Donna, Texas. His aunt, who considered him a little brother, remembered him as a funny and charismatic young man. His life was cut short on a Tuesday afternoon in early 2020.
On January 14, 2020, a farm worker in the Donna Lakes area discovered Castillo’s body on a caliche road near a sugarcane field off Valley View Road. The worker called 911 at approximately 5:47 p.m. When authorities from the Hidalgo County Sheriff’s Office arrived, they determined that Castillo had been shot multiple times and had likely died only 10 to 15 minutes before he was found.
At the scene, investigators recovered evidence that included tire tracks and .40 caliber bullet casings. The investigation quickly pointed to a suspect, and the following day, authorities arrested 17-year-old Carlos Julian Contreras of Alamo.
The sheriff’s office stated that they believed the murder resulted from a dispute over money that was linked to criminal activity.
Contreras was charged with murder. He pleaded not guilty and was released on bond while his case proceeded through the court system for several years. In September 2025, Contreras, then 23 years old, stood trial for Castillo’s murder. During the two-week trial, evidence was presented indicating that Contreras was involved in human smuggling and had lied to police during the investigation.
A jury found Carlos Julian Contreras guilty of murder. A judge subsequently sentenced him to 60 years in prison. At the sentencing hearing, Castillo’s heartbroken mother and aunt were permitted to speak directly to Contreras, sharing the profound impact of their loss. With the conviction and sentencing, the case was resolved in September 2025.
