American Mass Murderers

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.

Robert Pape was one of the perpetrators involved in the brutal 1998 murders of Becky Friedli, her mother, and her brother in California. The case remained unsolved for many years before advances in DNA technology and renewed investigation efforts led to arrests. Pape, along with an accomplice, was eventually identified and charged decades after the crime. The murders were violent and calculated, involving the killing of multiple family members inside their home. The delay in justice drew significant attention, highlighting the role of forensic advancements in solving cold cases. Pape was ultimately convicted, bringing closure to a long-standing and deeply tragic case.

Bryan Kohberger is an American man charged in connection with the 2022 murders of four university students in Moscow, Idaho. At the time of the incident, he was a criminology PhD student at Washington State University, located a short distance from the crime scene. The case gained widespread national and international attention due to the number of victims, the nature of the attack, and Kohberger’s academic focus on criminal behaviour. He was arrested in December 2022, and legal proceedings are ongoing.

Nikolas Jacob Cruz became one of the most notorious mass killers in modern American history after carrying out the February 14, 2018, shooting at Marjory Stoneman Douglas High School in Parkland, Florida. Armed with a semi-automatic rifle, Cruz murdered 17 students and staff members and wounded 17 others before fleeing the campus, making it one of the deadliest school shootings in United States history. The massacre shocked the world and sparked an unprecedented movement led by student survivors demanding stronger gun laws and improved school safety. Cruz's history of behavioral problems, mental health concerns, online threats, and numerous contacts with law enforcement became central to public debate following the attack. The shooting permanently changed the national conversation surrounding school violence and mass shootings.