Matthew James Ruth and the 2025 North Codorus Township Police Ambush
Overview of the Mass Shooting
Matthew James Ruth was a 24-year-old Pennsylvania man identified by authorities as the gunman who killed three police detectives and seriously wounded two other law-enforcement officers in North Codorus Township on September 17, 2025. The attack occurred at a rural farmhouse on Haar Road near Spring Grove in York County, Pennsylvania, where officers were attempting to locate and arrest Ruth during a domestic-violence-related stalking investigation.
Authorities said Ruth concealed himself inside the home of a former girlfriend and opened fire when detectives entered the residence. Armed with an AR-15-style rifle equipped with a suppressor, Ruth fired numerous rounds at the officers gathered near the doorway. Detective Sergeant Cody Becker, Detective Mark Baker and Detective Isaiah Emenheiser were killed. A fourth Northern York County Regional Police Department detective was seriously wounded, and a York County sheriff’s deputy was shot during the gunfight that followed.
Ruth eventually emerged from the house and continued exchanging gunfire with officers outside. He was fatally shot near the roadway by the wounded sheriff’s deputy and another Northern York County Regional officer. The confrontation ended approximately 15 hours after Ruth had first been photographed prowling around the property with a rifle.
Events Leading to the Attack
The investigation began during the late-night hours of September 16, 2025, when Ruth’s former girlfriend and her mother contacted police. A trail camera installed near their farmhouse had captured images of a man wearing camouflage and carrying what appeared to be an AR-style rifle. The man was reportedly using binoculars or a scope-like device to peer toward the residence.
The former girlfriend identified the man as Ruth, whom she had dated for only a short period. She told investigators that Ruth had never been invited to the rural property. Officers responded at approximately 11:30 p.m. but were unable to find him. During their search, police discovered a black 2000 Ford Ranger parked near a wooded area along the road.
The women left the residence because they feared Ruth might return. Before departing, they reportedly locked the house. Officers later searched Ruth’s residence in the Hanover area and spoke with members of his family, but Ruth was not there.
The former girlfriend also told police that she suspected Ruth of setting her pickup truck on fire while it was parked in the farmhouse driveway on August 20, 2025. She had initially asked police not to pursue an investigation. A fire investigator subsequently examined the incident and determined that the blaze had been intentionally set.
Based on the reported stalking, nighttime prowling and unauthorized presence on the property, Ruth was charged with misdemeanor stalking, loitering and prowling at night, and criminal trespass. A warrant was issued for his arrest during the morning of September 17.
Ruth’s Entry into the Farmhouse
Police returned to the property on September 17 with a larger group of officers. Six officers searched the surrounding farmland, buildings and wooded areas, using a drone to examine places where Ruth might have been hiding. During the search, they noticed that the farmhouse door was unlocked, even though the occupants said they had secured it before leaving.
Investigators concluded that Ruth had entered the residence and remained concealed inside. Authorities also reported that the family’s black Labrador had been shot and killed after Ruth entered the home. York County District Attorney Timothy Barker said the available evidence suggested that Ruth had carefully watched the house and surrounding buildings before the confrontation.
Although the officers were coming to arrest Ruth, investigators believed he may originally have been waiting to attack his former girlfriend. Because she and her mother had already fled, the detectives entered the house instead and became the targets of the ambush.
The September 17 Ambush
At approximately 2:10 p.m. on September 17, four plainclothes detectives wearing protective vests approached and opened the farmhouse door. Ruth immediately fired at them from inside the residence with the suppressed rifle.
Three detectives were fatally struck near the entrance. A fourth detective was seriously wounded. Ruth then exchanged gunfire with two officers positioned outside the house, striking a York County sheriff’s deputy. The officers returned fire as Ruth moved from the residence toward the road.
Ruth was shot and killed during the exchange. His death brought the immediate attack to an end, but emergency crews continued working to treat and evacuate the wounded officers. At least one injured officer was initially considered for transportation by medical helicopter before being taken to a hospital by ground ambulance.
The two surviving officers were hospitalized with serious injuries. Officials initially described one as being in critical but stable condition. Their names were not immediately released publicly.
Victims Killed in the Shooting
- Detective Sergeant Cody Becker, 39 — Killed on September 17, 2025, at the farmhouse on Haar Road in North Codorus Township, York County, Pennsylvania. Becker had served with the Northern York County Regional Police Department for approximately 16 years and held a supervisory position within the agency.
- Detective Mark Baker, 53 — Killed on September 17, 2025, while entering the North Codorus Township residence. Baker had served with the regional department for approximately 21 years after previously working as a police officer in Philadelphia.
- Detective Isaiah Emenheiser, 43 — Killed on September 17, 2025, during the initial burst of gunfire at the farmhouse entrance. Emenheiser was a veteran detective who had served with the department for approximately 20 years.
Officers Wounded
- Unidentified Northern York County Regional Police detective — Seriously wounded when Ruth opened fire from inside the farmhouse on September 17, 2025.
- Unidentified York County sheriff’s deputy — Shot during the gunfight outside the residence. Despite being wounded, the deputy and another officer returned fire and fatally shot Ruth near the roadway.
Experience of the Slain Officers
Becker, Baker and Emenheiser had nearly six decades of combined law-enforcement experience. Northern York County Regional Police Chief David Lash described them as respected leaders who had served their communities with courage, professionalism and dedication.
The Northern York County Regional Police Department had approximately 70 officers serving several municipalities in the York County area. Losing three veteran detectives during a single confrontation represented an extraordinary blow to the department and the communities it protected.
Investigation and Evidence
After the shooting, investigators searched locations associated with Ruth, including his family’s property in the Hanover area. Officers were seen carrying bags of potential evidence from the residence. Ruth’s relatives cooperated with investigators, and authorities did not announce criminal charges against his family members in connection with the attack.
Investigators examined Ruth’s rifle, ammunition, suppressor, vehicle, communications and activities before the shooting. They also reviewed trail-camera photographs, the earlier vehicle fire and evidence found inside the farmhouse. Because Ruth died at the scene, he was never tried or convicted of the murders or the earlier stalking-related offenses.
The York County District Attorney’s Office presented the attack as the final and most violent stage of an escalating pattern of fixation and domestic intimidation. Ruth had allegedly watched the farmhouse, entered the property without permission, carried a rifle while surveilling the residence and was suspected of destroying his former girlfriend’s vehicle before breaking into the home.
Motive and Intended Target
Authorities connected the violence to Ruth’s conduct toward his former girlfriend. District Attorney Barker said investigators believed Ruth had positioned himself inside the house as part of a planned ambush. Although the police officers became his victims, officials suspected that his former girlfriend may have been his original intended target.
The fact that Ruth reportedly brought a suppressed rifle, wore camouflage, surveyed the property and hid inside the locked residence supported the conclusion that the shooting was not a spontaneous reaction to the officers’ arrival. Instead, the available evidence indicated that he had prepared for an armed confrontation before the detectives entered.
Community Response
The deaths of Becker, Baker and Emenheiser led to an outpouring of grief across York County. Residents placed flags, flowers and memorial items near police facilities and along routes used during processions honoring the officers. Hundreds of community members attended a vigil at a Spring Grove-area church, where five candles represented the three officers who died and the two who survived with injuries.
Pennsylvania Governor Josh Shapiro ordered flags lowered to half-staff in honor of the detectives. State and federal officials offered condolences to their families and colleagues. The shooting was described as one of the deadliest attacks on Pennsylvania law-enforcement officers in modern state history.
Conclusion
Matthew James Ruth’s crimes culminated in a carefully positioned ambush at a rural York County farmhouse on September 17, 2025. What began as allegations of stalking, trespassing and suspected arson escalated into the murders of three experienced detectives and the wounding of two additional officers.
Detective Sergeant Cody Becker, Detective Mark Baker and Detective Isaiah Emenheiser were killed while attempting to protect a woman who had reported being watched and threatened by a former boyfriend. Ruth was killed during the ensuing gunfight, leaving investigators to reconstruct his intentions through physical evidence, court records, trail-camera images and witness statements. The attack devastated the Northern York County Regional Police Department and left a lasting impact on the communities the three detectives had served for many years.
