Police arrest 18-year-old in fatal CU Boulder party shooting
Boulder police announced Omar Perez's arrest on November 2 after a Halloween shooting killed one University of Colorado student and injured another.

- Development
- 2 November 2026
- Coverage
- Arrest
- Current status
- Developing case
- Source record
- 2 verified sources
Arrest announced
Boulder police arrested an 18-year-old Thornton man on November 2 in a Halloween shooting that killed a University of Colorado Boulder student and injured another. Omar Perez faces first-degree murder, attempted first-degree murder and first-degree assault charges, each involving extreme indifference, according to the department. Police said Perez is not a CU student and that investigators believe he was the only person who fired shots. The charges are allegations, and he is presumed innocent. [1]
Shooting at a house party
The shooting occurred at a home in the 700 block of Marine Street late on October 31. The Denver Gazette reported that the Boulder County Coroner identified the student who died as Luca Hanlon, 19. The other injured student was also 19. According to the newspaper, police had responded earlier to noise complaints and cited residents over the party. Hundreds of people left before the shooting. Police said a group later tried to enter the house by force and that shots were fired during a confrontation. [2]
Investigation continues
The police department said both victims were taken to hospital and one died early on November 1. The second remained hospitalized when the arrest was announced. Investigators said other people could face charges and asked partygoers to provide information, photographs or video. Police withheld Perez's photograph because of the ongoing investigation. The victims' families requested privacy and said they did not wish to speak with the media, according to the department. [1]
Identification followed a fast-moving party investigation
The Denver Gazette reported that a sibling helped identify Perez after images circulated during the investigation. Police had asked witnesses to preserve and submit video from the crowded party, where the number of people present complicated efforts to reconstruct the confrontation. The department's release did not identify the sibling or set out every step that led officers from the images to the arrest.
Police said Perez was the only suspected shooter, but that conclusion did not end the wider inquiry. Detectives continued examining the conduct of other people at the house, including the group they said attempted to force its way inside before shots were fired. [1] [2]
Charges do not resolve the disputed events
First-degree murder, attempted murder and assault are the allegations announced by police. The public statements did not identify a motive, describe the weapon or say whether it had been recovered. They also did not provide a complete account of the confrontation or disclose what Perez told investigators after his arrest. Those questions remain for the court record and continuing police work.
Perez is presumed innocent unless prosecutors prove the charges beyond a reasonable doubt. The next reliable developments would include formal charging documents, an advisement or bond hearing and any plea entered in Boulder County court. The surviving student's medical condition and any additional arrests also require confirmation from officials rather than inference from the initial announcement. [1] [2]
Sources & further reading
- Suspect Arrested in Marine Street Homicide; Victims' Families Request Privacy ↗Boulder Police Department / City of Boulder · 2026-11-02 · Primary source
- Suspect in CU students' shooting arrested after sibling identified him ↗The Denver Gazette · 2026-11-02
Reader comments.
Keep it respectful and relevant to the report. No personal information, harassment or unsupported accusations. Comments are readers’ views.
Loading your sign-in status…