A man armed with a machete killed his mother and grandparents inside a Piscataway home late Monday afternoon before charging at responding officers, who then fatally shot him, authorities said. Police were dispatched to a residence on River Road around 5:30 p.m. after a 911 call reported a person with a knife and threats of harm, officials said.
Officials described the episode as an isolated family tragedy that unfolded in minutes and left four people dead. Township leaders said the killings shocked a quiet Middlesex County neighborhood and launched parallel reviews by the Middlesex County Prosecutor’s Office and the New Jersey Attorney General’s Office, which routinely investigates deaths involving police force. The victims’ identities and ages had not been formally released as of Tuesday evening, pending family notification by the medical examiner. Authorities said initial information indicates officers attempted to subdue the man with Tasers before he advanced and was shot outside the home.
Police said the first 911 call came from a relative who reported an armed man at the River Road address shortly before dusk. Responding officers encountered the suspect at or near the doorway holding a large blade. “Less-lethal options were deployed first,” a township official said, describing the use of Tasers as officers tried to create distance. When the man moved toward them, at least one officer fired, striking him. After the scene was secured, officers entered the house and found three people dead inside. Neighbors reported hearing shouting and then sirens as patrol cars and ambulances converged on the block. A resident across the street said officers initially took positions behind vehicles and then approached the entrance in a tight line before backing away.
Investigators recovered multiple edged weapons from the home and were working to determine which were used in the killings, according to officials. Detectives are reviewing 911 recordings, body-camera video and nearby surveillance footage to piece together a minute-by-minute timeline from the first call to the gunfire. Piscataway Mayor Brian C. Wahler called the crime “unthinkable,” noting that a surviving father is now preparing to bury his wife, parents and son. He said early briefings indicated officers followed protocol by attempting less-lethal tools before firing their weapons. Authorities did not immediately release the number of shots fired, the exact distance between officers and the suspect, or whether the struggle moved between rooms before the confrontation at the door.
River Road runs through a residential stretch near Rutgers facilities and major commuter routes, where evening traffic can be heavy. Police diverted drivers to side streets as crime-scene tape went up around the property. The single-family house sits a short distance from the curb with limited exterior lighting, which investigators said complicated visibility as darkness fell. Several neighbors said the family had lived there for years and kept largely to themselves. By nightfall, detectives were photographing rooms, collecting measurements and marking items near the entryway and kitchen. Residents said they shared doorbell videos that captured patrol cars arriving and officers taking positions but did not show what occurred inside the home.
Officials framed the next steps in procedural terms common to New Jersey cases involving deadly force. The Attorney General’s Office of Public Integrity and Accountability is expected to interview the officers who discharged Tasers and firearms and to review body-camera footage. The Middlesex County Prosecutor’s Office is leading the homicide investigation into the three deaths inside the home, with autopsies to establish causes and times of death. Authorities said results will help determine whether all injuries were caused by a machete or if other knives recovered in the home were used. As standard practice, the involved officers were placed on administrative leave pending initial findings. No civilians other than the four family members were reported injured.
Neighbors who gathered at the end of the driveway described a block that sees joggers after work and school buses in the late afternoon, not squads of marked cars. “It was quiet and then suddenly lights everywhere,” said one resident, who watched officers string tape and place evidence markers near the stoop. Another neighbor said she often saw an older couple tending to the yard in warmer months and was stunned to learn relatives were among the dead. A small bouquet appeared near the curb by Tuesday afternoon. Township leaders thanked residents for sharing video quickly, saying early canvasses help detectives validate timing and movements when witnesses are shaken and memories are raw.
While some outlets named the suspect and reported ages for the victims, county officials had not confirmed identities publicly as of Tuesday, citing the active investigation and pending notifications. Authorities also did not state whether any prior calls for service had been made to the address or whether the suspect had a documented mental health or criminal history. Investigators said they are examining any prior contacts and will summarize those findings in a future update. Officials reiterated there was no broader threat to the public and that early evidence points to a domestic incident contained to a single household.
By early evening, officers remained on River Road as crime-scene technicians returned for follow-up measurements and additional photographs. Traffic resumed through one open lane while a patrol SUV idled near the driveway. Inside the tape line, investigators continued to bag potential evidence from the entry and kitchen areas. A neighbor walking a dog stopped to watch silently. “You never think something like this is happening behind a front door you pass every day,” he said.
As of Tuesday night, investigators awaited autopsy results and the Attorney General’s preliminary review of the officer-involved shooting. Officials said the next public milestone will be a case update after autopsies and officer interviews are complete later this week, followed by a fuller timeline of the initial 911 call, response and discovery inside the home.
Author note: Last updated January 6, 2026.