Omar Perez Boulder Shooting: 18-Year-Old Arrested in Fatal Shooting of University of Colorado Boulder Student

An 18-year-old identified as Omar Perez has been arrested in connection with a fatal Halloween-night shooting that claimed the life of a University of Colorado Boulder student and left another student injured.

Boulder police confirmed Perez’s arrest on Monday, November 2, 2026. He was booked into the Boulder County Jail on charges including first-degree murder, attempted first-degree murder, and first-degree assault.

What Happened in the Boulder Shooting?

The shooting occurred at approximately 11:28 p.m. on Saturday, October 31, 2026, at a residence in the 700 block of Marine Street in Boulder’s University Hill neighborhood.

According to police, officers responding to reports of gunfire found two 19-year-old men suffering from gunshot wounds. Both victims were transported to a hospital.

One of the students died from his injuries early Sunday, November 1. The second victim remained hospitalized in critical condition in the latest reports.

Both victims were students at the University of Colorado Boulder. The identity of the student who died had not been publicly released in the initial police announcement, pending notification of family and further examination by the Boulder County Coroner’s Office.

Omar Perez Arrested and Charged

Boulder police arrested Omar Perez, 18, on the morning of November 2 in connection with the shooting. Investigators believe he was the only shooter involved in the incident.

The charges reported against him include:

• First-degree murder

• Attempted first-degree murder

• First-degree assault

The arrest followed an investigation that included witness interviews and the examination of evidence from the scene.

Police have described the investigation as ongoing. The charges are allegations, and Perez is presumed innocent unless and until proven guilty in court.

What Led to the Shooting?

Investigators said officers had responded to the residence earlier on Saturday evening following a noise complaint involving a large Halloween party.

Police contacted people at the property and issued citations related to a nuisance party. The gathering subsequently broke up, and hundreds of attendees reportedly left, although a smaller group remained inside the home.

According to investigators, a group of individuals later attempted to force their way into the residence. A scuffle reportedly followed, and gunfire struck the two students.

Police believe the shooting occurred inside the residence. The precise sequence of events and the circumstances surrounding the confrontation remain part of the investigation.

University of Colorado Boulder Community Responds

The shooting has deeply affected the University Hill neighborhood and the wider University of Colorado Boulder community.

The deaths and injuries of students in a campus-adjacent incident have raised concerns among students and residents. The university has made support services available to people affected by the incident.

Police have also continued encouraging anyone with information, photographs, or video footage from the gathering to contact investigators.

Personal and Case Details

Shooting and Incident Details

Disclaimer

This report is based on information released by Boulder police and published news reports as of November 2, 2026. Criminal charges are allegations, not proof of guilt. Omar Perez is presumed innocent unless proven guilty in court. The deceased student’s identity had not been publicly confirmed in the initial police announcement, and further details may emerge as the investigation continues.