A Boulder Halloween shooting at a large off-campus party has killed one University of Colorado student and left another critically injured, Boulder police said on Sunday, November 1, 2026, in what officers described as the city's first homicide of the year.

Key Points

• The Boulder Halloween shooting happened just before 11:30 p.m. on Saturday, October 31, 2026, at a home in the 700 block of Marine Street in Boulder's University Hill neighbourhood.
• Both victims were 19-year-old men who attended the University of Colorado Boulder. One died and the other was in critical condition. Neither has been publicly identified.
• Police said officers had shut down a large Halloween party at the same home earlier in the evening after a noise complaint, and most guests had left before the shooting.
• Investigators believe a group tried to force its way into the home, and shots were fired inside. No suspect has been identified or arrested.
• Boulder police are seeking two persons of interest seen on doorbell camera footage and have interviewed about 20 witnesses.

What Happened

The first calls about the shooting came in at 11:28 p.m. on Saturday, Boulder police said at a Sunday morning news conference. The first officers arrived two minutes later and found two people with gunshot wounds at the home near 7th and Marine streets. Both were taken to hospital, where one died and the other remained in critical condition.

Police said a large Halloween party had been held at the home that night. Officers had responded earlier in the evening to a noise complaint and cited the people who live at the home, according to Colorado Public Radio's account of the department's news release. After that visit, the party broke up and most of the people who had attended left the area. Police said only a small group remained at the house.

Later, police believe, a group of people tried to force their way into the home, and shots were fired inside. Detectives have not said how many people were in that group, what weapon was used, or whether the two victims were the intended targets. Those questions remain open, and police have not named a suspect.

Neighbours described a night that changed quickly. Ashtyn Turney, who lives near the site with roommate Joann Frank, told campus radio station KVCU: "We were just getting ready to go to bed. There was a huge party the cops had just shut down." Frank added: "The party had been shut down for a while. There was just some residual groups of people." Their account matches the police timeline: a loud, crowded evening, a police shutdown, and then gunfire from inside the house roughly an hour or more later.

Reports from the Sunday briefing said the party had been registered through a programme run jointly by CU Boulder and Boulder police, which allows students to notify police about planned gatherings. Officers shut the gathering down at about 10:02 p.m. after a noise complaint, according to those reports. Police have not confirmed every detail of the registration in the material checked for this article, and the central facts — the time, place, victims' ages and university, and the absence of an arrest — come from the department's own statements as reported by Colorado Public Radio and KVCU.

Boulder Halloween Shooting: The Investigation So Far

The investigation is now focused on video and witnesses. Boulder police said they are searching for two persons of interest who were seen on doorbell camera footage, and they shared photos and video of the two men at the Sunday news conference. Police have stressed that the two are persons of interest, not charged suspects, and they have not released their names.

Detectives have interviewed about 20 witnesses, police said. They are asking anyone who attended the party, or who has any information, photos or video from at or near the site, to contact Boulder Police at 303-441-3333 and reference case 26-10148. Photos and video can also be submitted through the department's online evidence portal.

The victims have not been identified. Police said both were 19-year-old men who attended the university, and the coroner's office will release the identity of the student who died after notifying his family. That restraint matters: in the hours after a campus-area killing, unverified names often circulate online, and police have asked the public to rely on official releases while families are contacted.

Boulder Police Chief Redfearn told the Sunday news conference: "We are committed to finding those responsible for this heinous crime." He also described the shooting as the city's first homicide of 2026, a striking fact for a city and a university neighbourhood where a fatal shooting at a student party is, in the chief's framing, an abnormal event. No motive has been announced, and police have not said whether the people who tried to enter the home knew anyone inside.

Background: University Hill and a Halloween Weekend of Violence

University Hill, known locally as "the Hill", is the student neighbourhood immediately west of the CU Boulder campus, a dense mix of rented houses, apartment buildings and small businesses where Halloween parties are a long-standing tradition. The 700 block of Marine Street sits in that neighbourhood, close to campus but off campus itself — an important distinction, because the shooting was not on university property and CU Boulder has described it as an off-campus incident.

The Boulder shooting was one of several shootings near American college campuses over the Halloween weekend, but police have presented them as separate incidents, not as a connected series. In East Lansing, near Michigan State University, five people were wounded in two shootings early on Sunday. In Bloomington, Illinois, near Illinois Wesleyan University, a 19-year-old woman was killed and seven other people were hurt. In Birmingham, Alabama, one person was killed and eight were wounded after the Magic City Classic football game. There is no evidence in the reporting checked for this article that any of those incidents is linked to Boulder, and this article does not suggest otherwise.

What links them is timing and setting: Halloween, homecoming and rivalry weekends that bring large crowds, house parties and late-night street gatherings to college towns, and that stretch local police. Boulder's case is distinct in one respect: officers had already visited the Marine Street home that night, cited the residents and dispersed most of the crowd, yet violence still followed after most guests had gone. That sequence — a registered, then shut-down party, followed by a forced entry and gunfire inside — is now the core of the investigation.

CU Boulder is a large public university with tens of thousands of students, and University Hill is where many of them live. A fatal shooting there, on Halloween night, inevitably reaches far beyond the street itself: into classrooms, dormitories and family group chats across Colorado and beyond. Police and university officials have therefore moved quickly to confirm the basic facts while holding back names and speculation.

Reactions

CU Boulder Chancellor Justin Schwartz said in a statement on Sunday: "This is an incredibly traumatic event for our campus community. Our thoughts and sympathies are with all those impacted by this tragedy, especially those students, families, faculty and staff who have been directly impacted or experienced significant loss."

Chief Redfearn's message at the news conference was narrower and operational: a commitment to find those responsible, and a direct appeal for video and witnesses. That appeal is the investigation's most practical need. With about 20 witnesses already interviewed, police are hoping that partygoers' phone footage, doorbell video and social media clips will identify the two persons of interest and establish exactly what happened at the door of the Marine Street home.

Neighbours' first reactions, as captured by KVCU, were shock at the speed of the change: a party shut down, a quieter street, and then gunshots from inside a house. No neighbour quoted in the reporting checked for this article claimed to have seen the shooting itself, and none named a suspect. That gap between hearing gunfire and knowing who fired it is precisely why police have asked for footage rather than rumour.

Why It Matters

It matters because a 19-year-old student is dead, another is fighting for his life, and no one has been arrested. For the families, the university and the Boulder community, the next facts — a name, a condition update, an arrest — will matter more than any analysis. For the wider public, the case is a reminder of how quickly a crowded student party can turn dangerous, even after police have intervened once that evening.

It matters, too, because Boulder police have framed this as the city's first homicide of 2026. If that stands, it underlines how unusual a fatal shooting is in Boulder, and why the department has put a public appeal for video at the centre of its response. It also raises questions that only the investigation can answer: who tried to force entry, why, and whether the two persons of interest are witnesses, participants or suspects.

Finally, it matters because Halloween weekend produced a cluster of campus-area shootings across the country, and readers will naturally ask whether they are connected. On the evidence available, they are not: different cities, different police departments, different circumstances, and no statement from any department suggesting a link. Treating them as one story would mislead; treating Boulder on its own verified facts is the accurate course.

What Happens Next

Boulder police will continue interviewing witnesses and reviewing video, including doorbell camera footage of the two persons of interest. The department has asked anyone with information to call 303-441-3333 and reference case 26-10148, or to submit photos and video through its online portal.

The coroner's office is expected to release the identity of the student who died after his family has been notified. Updates on the second student's condition are also expected, though hospitals and police often hold those details while families are informed and treatment continues. Any arrest, charge or identification of a suspect would be a new development, and this site will report it when police announce it — not on the basis of unverified social media claims.

CU Boulder is expected to provide support services for students affected by the shooting, as it does after campus-community tragedies, and police are expected to give further briefings as the investigation develops. Until then, the verified picture is this: a Halloween party shut down, a forced entry, two 19-year-old students shot inside a University Hill home, one dead, one critical, and a police search for two people seen on camera.

Frequently Asked Questions

What happened in the Boulder Halloween shooting?

Just before 11:30 p.m. on Saturday, October 31, 2026, two 19-year-old University of Colorado Boulder students were shot inside a home in the 700 block of Marine Street in Boulder's University Hill neighbourhood. One died and the other was critically injured.

Has anyone been arrested in the Boulder shooting?

No. Boulder police said on Sunday, November 1, 2026, that no suspect had been identified or arrested. Police are seeking two persons of interest seen on doorbell camera footage.

Was the party shut down before the shooting?

Yes. Police responded to a noise complaint earlier in the evening, cited the people who live at the home, and dispersed most of the large Halloween party. Police believe a group later tried to force its way into the home, and shots were fired inside.

Who were the victims?

Police have said only that both victims were 19-year-old men who attended the University of Colorado Boulder. Their names have not been released, pending notification of families.

How can anyone with information help Boulder police?

Call Boulder Police at 303-441-3333 and reference case 26-10148, or submit photos and video through the department's online evidence portal.

Related coverage: Five wounded in East Lansing Halloween shootings near Michigan State; Bloomington, Illinois shooting: 19-year-old woman killed, 7 others hurt near campus; Birmingham Magic City Classic shooting: mayor reveals two attacks, teen held.

Sources: Colorado Public Radio, November 1, 2026; KVCU Radio 1190, November 1, 2026; Boulder Police Department statements and Sunday news conference as reported by those outlets. The featured image is an illustrative generated scene of a night-time police response in a university neighbourhood, not an actual photograph of the Marine Street home. Victims' names have not been released and no suspect has been named.