American Mass Murderers

Austin David Thompson carried out a mass shooting in Raleigh's Hedingham neighborhood on October 13, 2022, killing five people and injuring two others. Thompson, who was 15 at the time, first killed his 16-year-old brother James inside their home before leaving the house and shooting people in the surrounding neighborhood, including off-duty Raleigh Police Officer Gabriel Torres. He later pleaded guilty to five counts of first-degree murder and additional charges. In February 2026, Thompson was sentenced to five consecutive life terms without the possibility of parole.

Adam Matos murdered his former girlfriend Megan Brown, her parents, and her new boyfriend in a brutal quadruple homicide in Hudson, Florida, in 2014. Matos killed Megan, 27, her parents Gregory and Margaret Brown, both 52, and Megan's new boyfriend, Nicholas Leonard, 37, at the waterfront home where Matos had been living with members of the Brown family. Megan and Gregory were shot, while Margaret and Leonard were killed by blunt-force trauma. Matos subsequently moved the bodies from the property and left them stacked in a nearby field, where they were discovered during the investigation.

Richard Benjamin Speck became one of America's most infamous mass murderers after murdering eight student nurses during a single night in Chicago, Illinois, on July 13–14, 1966. The attack at a South Side townhouse generated worldwide attention and became one of the most notorious crimes in American history. Speck was convicted of eight counts of murder and sentenced to death, although his sentence was later commuted to imprisonment following changes to U.S. capital punishment laws. He died in prison in 1991.

Shane Devon Tamura became the perpetrator of one of New York City's deadliest shootings in decades after opening fire inside a Midtown Manhattan office tower on July 28, 2025. The attack killed four people and injured several others before Tamura died by suicide. Investigators concluded that he had intended to target the National Football League (NFL) headquarters housed within the building and found writings indicating grievances related to chronic traumatic encephalopathy (CTE), although the full motive remains under investigation.

George Emil Banks became one of the most infamous mass killers in Pennsylvania history after murdering 13 people during a shooting spree in Wilkes-Barre on September 25, 1982. Among his victims were five of his own children, their mothers, and several relatives. The murders shocked the United States because of the extraordinary number of family members killed in a single attack. After decades of legal proceedings centred on his mental competency, Banks died in prison in 2024 without ever being executed.

Charles Boney became infamous for his role in the murders of Kimberly "Kim" Camm and her two children, Brad and Jill Camm, in Georgetown, Indiana, on September 28, 2000. A convicted violent offender with a history of crimes against women, Boney was eventually identified as being connected to the crime scene through forensic evidence, including a sweatshirt recovered near the victims' bodies. The case gained national attention because David Camm, Kim's husband and a former Indiana State Trooper, was initially blamed for the murders and spent years in prison before being acquitted. Prosecutors ultimately argued that Boney participated in the killings, while Boney attempted to shift responsibility onto Camm. The case became one of the most notorious murder investigations in Indiana history and remains closely associated with wrongful conviction debates and forensic controversy.

Michael Paul Brown became known after carrying out the deadly Owl Bar shooting in Montana, killing four people during a violent attack that shocked the local community. The massacre unfolded inside and around the Owl Bar in Anaconda, Montana, where Brown targeted victims connected to a long-running personal dispute before fleeing the scene. Authorities described Brown as a heavily armed and dangerous suspect whose actions triggered a large-scale manhunt and emergency lockdowns across the region. The case generated widespread media coverage because of the sudden brutality of the attack, the multiple homicide victims and the dramatic police confrontation that followed shortly afterward.

George "Billy" Wagner III was a member of the Wagner family responsible for the Pike County massacre, one of the deadliest family murder cases in Ohio history. Prosecutors proved that Wagner, together with his parents George "Billy" Wagner II and Angela Wagner, and his brother Edward "Jake" Wagner, conspired to murder eight members of the Rhoden family in April 2016 during a bitter custody dispute over Jake Wagner's daughter. Following one of Ohio's largest criminal investigations, Wagner was convicted in 2022 of eight counts of aggravated murder and numerous related offences. He was sentenced to eight consecutive life terms without the possibility of parole and remains incarcerated.