School Trainer Arrested After Teen’s Assault Report

Knee with colorful kinesiology tape applied
Photo: Piyada Jaiaree / Shutterstock

A 16-year-old student told police a trusted school athletic trainer sexually battered her during treatment and filmed it on his phone.

Story Snapshot

  • San Jose police arrested a school athletic trainer one day after a student’s report.
  • Detectives say they found video evidence on the trainer’s phone consistent with the report.
  • The suspect, 31-year-old Kelvin Chiu of Fremont, worked at Archbishop Mitty High School.
  • He was booked on suspicion of sexual battery and production and possession of child sexual abuse material.

Police say a trainer assaulted a student and recorded it

San Jose police said officers responded around 7:30 p.m. on October 8, 2026, and spoke with a 16-year-old girl. She reported that an athletic trainer sexually battered her while treating a sports injury and recorded the assault on his phone. Detectives moved fast. They secured search warrants for the suspect, his home, and vehicles. Officers arrested 31-year-old Kelvin Chiu in Fremont the next day, October 9. Booking records list several serious offenses tied to the case.

Authorities identified Chiu as an athletic trainer employed by Archbishop Mitty High School in San Jose, a private Catholic campus on the 5000 block of Mitty Way. Police said the school administration was notified and is cooperating with the investigation. The Diocese said Chiu started working at the school in May 2025 and was placed on administrative leave after the arrest. That timeline matters because access and trust grow over time in school athletics.

Evidence on a phone, bookings that go beyond one charge

The San Francisco Chronicle reported that officers searched Chiu’s phone and found footage matching the student’s account. Other outlets reported that detectives found child sexual abuse material on the device as well. Police booked Chiu into Santa Clara County Main Jail on suspicion of sexual battery, annoying or molesting a minor, and the production and possession of child sexual abuse material. These are allegations at this stage, but they reflect a defined, multi-count investigation built around digital evidence.

Police also said they believe there may be additional victims and asked the public to share any tips. That kind of appeal is common in crimes where an adult holds authority over many minors. Athletic trainers often meet students alone, in private rooms, and with a clear power imbalance. That setting can be safe when rules are strong and followed. It can also be abused when safeguards fail, which is why access logs and supervision policies matter so much.

Why this case hits a nerve in youth sports

Research shows that abuse in youth and elite sports is not rare. One large study found that about one in ten young elite athletes reported sexual abuse related to athletics. Another report from Quebec found that more than one in ten teens experienced sexual violence by a person in authority in sports, a group that includes trainers and health staff. These numbers do not judge this case. They explain why parents and schools treat any red flag in athletic settings as urgent and credible to check.

Common sense also applies. Parents expect tight controls when a student gets treatment: open doors, two-adult rules, scheduled visits, and detailed notes. Schools should keep camera-free zones for privacy, yet ban personal-device recording during treatment. When followed, these rules protect students and honest staff. When ignored, they invite harm and doubt. This case will test how well policies worked at a top private school and whether warning signs were missed.

What comes next and what accountability should look like

Prosecutors will review the evidence, including any video and phone data, and decide on formal charges. Defense counsel will have a chance to challenge searches and contest what the files show. The legal process must protect the student’s privacy at every step. The school and Diocese should audit access logs, training room procedures, and complaint channels, and publish policy fixes that do not expose the minor. Police asked anyone with relevant information to come forward.

Sources:

nypost.com, nbcbayarea.com, abc7news.com, cbsnews.com, yahoo.com, sfchronicle.com