Police say the suspect left the fight, retrieved a gun and later told his father, “I shot somebody.”

BOZEMAN, Mont. — A 22-year-old Bozeman man is jailed on homicide allegations after police say he shot and killed Sidney Callaghan outside a crowded downtown bar shortly before 1 a.m. May 25.

Jakob Steven Lundberg is accused of deliberate homicide, criminal endangerment and tampering with evidence in the death of Callaghan, 29. The case has drawn close attention in Bozeman because investigators say the shooting happened on a busy Main Street sidewalk while bar patrons, pedestrians and people at nearby businesses were close by.

The night began as a fight inside the Rocking R Bar in downtown Bozeman, according to police records described in court filings. Staff stepped in and escorted Lundberg and Callaghan outside, but the confrontation did not end there. Investigators say the men kept fighting on or near the sidewalk in the 200 block of East Main Street. At some point, police say, Lundberg walked away from the fight and went to a red Subaru WRX. He then returned with a handgun. Bozeman Police Detective Kyle Hodges wrote that Lundberg pushed out his hands in an “isosceles” shooting stance and aimed at Callaghan. Hodges said Lundberg lowered the gun, moved closer, raised it again and fired.

Police say Callaghan fell to the ground after being shot several times. Officers were dispatched at 12:44 a.m. after reports that a person had been shot outside a local bar and that the shooter had left in a vehicle. The first officers at the scene began life-saving measures before Callaghan was taken to Bozeman Health Deaconess Hospital. Anthony Hutchings, a detective captain with the Bozeman Police Department, said officers tried to save the victim after they arrived. “Tragically, they were transported to local hospital and then determined to be deceased,” Hutchings said. Authorities later identified the victim as Sidney Callaghan. Police have not publicly described what started the fight inside the bar.

The case moved quickly after the shooting because witnesses gave police a description of the fleeing vehicle, investigators said. Lundberg was later found in his Subaru near a Walmart on North Seventh Avenue. Police say he had contacted his father after the shooting and said, “I shot somebody.” Charging records also say Lundberg made limited comments to officers after his arrest, other than spontaneous statements that he regretted what he had done. Investigators say surveillance footage became a key part of the case because it showed the fight spilling outside and the shooting occurring with numerous bystanders nearby. That footage, police say, also helped support the criminal endangerment allegation because people other than Callaghan were close to the gunfire.

After the arrest, police focused on finding the handgun they believe was used in the shooting. Investigators say Lundberg told officers he had discarded the weapon near a white van. Officers were concerned that an unattended gun could create a public safety risk during the Memorial Day parade. A police dog named Copper, trained to detect firearms and explosives, helped locate what authorities described as the suspected weapon the next day. Police have not publicly released a full forensic summary of the gun, the number of rounds fired or whether ballistics testing has been completed. They also have not said whether anyone else was struck or physically injured during the confrontation.

Lundberg made his initial appearance in Gallatin County Justice Court the day after the shooting. Gallatin County Justice of the Peace Rick West was advised that Lundberg had been arrested on allegations of deliberate homicide, criminal endangerment and tampering with evidence. His bond was set at $1.5 million. Prosecutors said the investigation was still in its early stages and that formal charges were expected to follow after review of the evidence. Gallatin County Attorney Audrey Cromwell said the shooting had shaken the center of the community. “Violence of this magnitude in the heart of our community is devastating,” Cromwell said. She said her office would work with police to review the case and seek justice for Sidney.

The fatal shooting came during a late-night holiday weekend in a part of Bozeman known for restaurants, bars and heavy foot traffic. Police said the scene was crowded when gunfire broke out. Local witnesses interviewed by area media described unease after the shooting but also said the downtown area is usually a place where people gather without fear. Hutchings said the case was unusual for Bozeman and that downtown remains an area police watch closely. “I will say this is abnormal for what we have in Bozeman,” Hutchings said. He also said police focus on downtown safety, while noting that sudden violence can happen outside a person’s control.

The affidavit’s description of the shooting stance became one of the most specific details released in the case. An isosceles stance generally refers to a two-handed handgun position in which both arms are extended toward a target. Police used the term in the charging narrative to describe what they say they saw on surveillance footage. The description matters to investigators because it frames the shooting as a sequence of actions: leaving the fight, getting a gun, returning, aiming, lowering the weapon, moving closer and then firing. Lundberg has not been convicted of a crime. The allegations remain pending as prosecutors continue their review.

Callaghan’s death left police with a case that stretched from the bar to the sidewalk, from the fleeing car to the recovery of the gun. The known timeline begins with the fight inside Rocking R Bar, continues with staff removing the men, and ends with a jail booking and a $1.5 million bond. Still unknown are the full details of the argument, what witnesses told detectives and whether prosecutors will add or change charges when the case moves forward.

For now, Lundberg remains held at the Gallatin County Detention Facility. His next listed court appearance was scheduled for June 12, while police and prosecutors continued reviewing surveillance footage, witness statements and evidence tied to the recovered firearm.

Author note: Last updated June 23, 2026.