Boulder man charged with murder after fatal Halloween shooting at party

Key points

• Omar Perez, an 18-year-old from Thornton, was booked at Boulder County Jail on Monday morning facing one count of first-degree murder, one count of attempted first-degree murder, and one count of first-degree assault with extreme indifference.
• The shooting took place around 11:28 p.m. on October 31 at a home in the 700 block of Marine Street, where two 19-year-old CU students were shot; one died early Sunday, while the other remains in critical condition.
• Police had previously shut down a large Halloween party at the same location around 10 p.m. for a noise violation, but a smaller group remained inside. Detectives believe the shooting followed an attempt by a group to force entry into the home.
• According to an arrest affidavit cited by Axios, Perez fired approximately three shots into a crowd after a witness put him in a headlock to break up a fight near the front door. Police believe he fired indiscriminately rather than targeting specific individuals.
• Perez is not a CU student. He is required to be held without bail under Colorado law for first-degree murder charges. He is scheduled for a hearing on advisement on Tuesday afternoon.
• Boulder Police Chief Steve Redfearn stated this was the city's first homicide of 2026. Approximately 20 witnesses have been interviewed, and police are seeking public help to identify other individuals present at the party.

Background

This incident follows a pattern of campus-adjacent violence seen in other jurisdictions, such as the recent conviction of a man for shooting Palestinian students near the University of Vermont. In Boulder, the shooting occurred shortly after police had intervened to disperse a large gathering, highlighting tensions between noise enforcement and subsequent criminal activity. The victim's death marks the first homicide in Boulder for the year, a statistic emphasized by local officials to underscore the severity of the event.

How outlets are covering it

Boulder Daily Camera and the City of Boulder police release focus on the formal charges and the procedural aspects of the arrest, emphasizing the legal consequences for Perez and the community's need for safety. Axios provides a more detailed narrative of the physical altercation, citing an arrest affidavit that describes Perez firing into a crowd after being restrained by a witness. While all sources agree on the basic facts of the shooting and the suspect's identity, Axios offers specific details about the mechanics of the shooting (firing into the crowd vs. targeting individuals) that are not detailed in the police release. The Boulder Daily Camera highlights the emotional response from local officials, including the District Attorney and Police Chief, whereas the City of Boulder release focuses more on the investigative process and public assistance requests.

Why it matters

The case highlights the potential for violence to escalate from noise complaints and party disputes, particularly in areas with high student populations. The arrest of an 18-year-old for a fatal shooting underscores the severity of the charges and the legal implications for young offenders in Colorado. It also raises questions about the effectiveness of police interventions in preventing such incidents and the role of community vigilance in identifying suspects and witnesses.

What to watch

Perez is scheduled to appear in Boulder County District Court on Tuesday afternoon for a hearing on advisement. The investigation remains active, with police continuing to seek public assistance to identify other individuals present at the party. The second victim remains in critical condition, and the Boulder County Coroner's Office is expected to release the identity of the deceased victim. Additional charges may be pursued for other individuals involved in the incident.