In 2023, 8,842 murderers in the United States were white, while 6,405 were Black. A further 461 murderers were of another race, including American Indian or Alaska Native, Asian, and Native Hawaiian or Other Pacific Islander. However, not all law enforcement agencies submitted homicide data to the FBI in 2023, meaning there may be more murder offenders of each race than depicted. While the majority of circumstances behind murders in the U.S. are unknown, narcotics, robberies, and gang killings are most commonly identified.

In 2023, there were 14,327 murder offenders in the United States who were male, in comparison to 1,898 who were female. However, there were also 5,279 murder offenders where their gender was unknown. Homicides in the U.S. Murder and non-negligent manslaughter in the United States is defined as the willful killing of another human being. Justifiable homicides, or cases where a felon is killed by an officer in the line of duty or a felon is killed during a felony by a private citizen, are not included in murder counts by the Federal Bureau of Investigation (FBI). The total number of murders varies from state to state in the U.S., with more populous states having higher numbers of murders. Murder offenders and victims Most murder offenders in the United States are between the ages of 17 and 39, with the number of offenders declining steadily after age 40. Additionally, the highest rate of death by homicide was found among males between the ages of 15 and 24. The highest rate of death by homicide for females was for girls under the age of one.

Contains: S1_01.csv: Data on road fatalities, linguistic diversity and demographic variables for countries. S1_02.csv: Data on Siestas and morphological complexity. S1_02b/AlgTree_ASJP_Ethno.nwk: Phylogenetic tree of languages. S1_02b/s.csv: Data on Siestas and morphological complexity. S1_02b/Siesta_PhyloLogit.r R script for running phylogenetic generalised estimating equations test. S1_03.csv: Data on population size and extramarital sex frequency. S1_04.csv: Data on genetic correlates of collectivism and migration. S1_05.csv: Data on Tone langauges and Acacia trees. S1_6.csv: Data on Acacia tree and traffic accidents. S1_07.csv: Data on Chocolate consumption and serial killers. (ZIP)