A 15-year-old boy has been missing since Monday night after leaving his West Side home near the 9600 block of U.S. Highway 90 and walking toward his neighborhood community center, and investigators say his cellphone is now off and his whereabouts are unknown. Justin Sierra was last seen around 9:30 p.m. Monday wearing a black shirt, black shorts, and black sandals, and carrying a Mickey Mouse backpack.
The Bexar County Sheriff's Office is asking the public for help locating Sierra, describing him as 5 feet 6 inches tall, weighing 135 pounds, with brown hair and brown eyes. According to the Bexar County Sheriff's Office, deputies have made unsuccessful attempts to reach Sierra since he left home, and his phone remains off. Local CBS affiliate KENS 5 confirmed the same last-known movement, reporting that Sierra was walking toward the community center near his home when he was last seen.
Anyone with information is asked to call the sheriff's office at 210-335-6000. The BCSO Missing Persons Unit also accepts tips by email at [email protected], per the sheriff's office post. As of Tuesday's report, no statewide AMBER or CLEAR Alert criteria had been met in Sierra's case, leaving the search centered on public tips and local precinct efforts.
A Pattern Of Missing Teens On The West Side
Sierra's disappearance follows a string of similar cases Hoodline has tracked in Bexar County over the past two years, including the search for Ruben Paz, another missing 15-year-old boy. Past cases have also involved teenage girls reported missing in west Bexar County, underscoring how often the sheriff's office turns to public appeals to locate juveniles.
The sheriff's office has pointed to a broader rise in local runaway cases. In a public notice issued in May, the agency warned that adults frequently try to shelter missing juveniles themselves rather than notifying law enforcement, a pattern officials say complicates recovery efforts.
Harboring A Runaway Carries Real Legal Risk
Texas law draws a sharp line between a missing juvenile and the adults who might take one in. Under Texas Family Code Section 51.03, running away from home is treated as a civil status offense rather than a crime, classifying a runaway under 17 as a child in need of supervision rather than a criminal suspect.
But adults face a different standard. Under Texas Penal Code Section 25.06, anyone who knowingly shelters a runaway minor without notifying police or a parent within 24 hours commits harboring a runaway child, a Class A misdemeanor carrying up to a year in jail and a $4,000 fine. The law has been enforced locally before: in April, Bexar County deputies arrested a resident in far west Bexar County after finding a missing minor hidden inside a structure on the suspect's property, according to KENS 5. Emergency medical services evaluated that child before reuniting the minor with parents.
An Understaffed Unit Leans On Outside Help
Bexar County's Missing Persons Unit, created in 2017, has historically operated with a single dedicated detective handling hundreds of case files opened annually, reporting from the San Antonio Report found. That staffing gap has pushed the sheriff's office to lean on partnerships, including a 2025 collaboration with the U.S. Marshals Service Lone Star Fugitive Task Force and the San Antonio Police Department under an initiative called Operation Lightning Bug, aimed at recovering endangered missing children regionally.
When a search turns urgent, the sheriff's office can call on mounted patrol officers, aerial search drones, and K-9 tracking teams to cover ground quickly, deployments Hoodline has previously detailed in coverage of similar West Side searches. Missing-child reports in Texas also feed into a statewide system: the Texas Department of Public Safety's Special Crimes Service Missing Persons Clearinghouse maintains a database and toll-free line, 800-346-3243, to coordinate cases that cross county lines.
The National Center for Missing & Exploited Children advises anyone who spots a missing teenager not to approach them directly, but to immediately contact law enforcement or the sheriff's dispatch line instead, since a startled juvenile may run from a stranger. For now, Justin Sierra's family and Bexar County investigators are counting on the public to be their eyes.
