This dataset is about countries per year in South America. It has 768 rows. It features 4 columns: country, suicide mortality rate, and population.

THIS DATASET WAS LAST UPDATED AT 2:11 PM EASTERN ON JULY 4

OVERVIEW

2019 had the most mass killings since at least the 1970s, according to the Associated Press/USA TODAY/Northeastern University Mass Killings Database.

In all, there were 45 mass killings, defined as when four or more people are killed excluding the perpetrator. Of those, 33 were mass shootings . This summer was especially violent, with three high-profile public mass shootings occurring in the span of just four weeks, leaving 38 killed and 66 injured.

A total of 229 people died in mass killings in 2019.

The AP's analysis found that more than 50% of the incidents were family annihilations, which is similar to prior years. Although they are far less common, the 9 public mass shootings during the year were the most deadly type of mass murder, resulting in 73 people's deaths, not including the assailants.

One-third of the offenders died at the scene of the killing or soon after, half from suicides.

About this Dataset

The Associated Press/USA TODAY/Northeastern University Mass Killings database tracks all U.S. homicides since 2006 involving four or more people killed (not including the offender) over a short period of time (24 hours) regardless of weapon, location, victim-offender relationship or motive. The database includes information on these and other characteristics concerning the incidents, offenders, and victims.

The AP/USA TODAY/Northeastern database represents the most complete tracking of mass murders by the above definition currently available. Other efforts, such as the Gun Violence Archive or Everytown for Gun Safety may include events that do not meet our criteria, but a review of these sites and others indicates that this database contains every event that matches the definition, including some not tracked by other organizations.

This data will be updated periodically and can be used as an ongoing resource to help cover these events.

Using this Dataset

To get basic counts of incidents of mass killings and mass shootings by year nationwide, use these queries:

Mass killings by year

Mass shootings by year

To get these counts just for your state:

Filter killings by state

Definition of "mass murder"

Mass murder is defined as the intentional killing of four or more victims by any means within a 24-hour period, excluding the deaths of unborn children and the offender(s). The standard of four or more dead was initially set by the FBI.

This definition does not exclude cases based on method (e.g., shootings only), type or motivation (e.g., public only), victim-offender relationship (e.g., strangers only), or number of locations (e.g., one). The time frame of 24 hours was chosen to eliminate conflation with spree killers, who kill multiple victims in quick succession in different locations or incidents, and to satisfy the traditional requirement of occurring in a “single incident.”

Offenders who commit mass murder during a spree (before or after committing additional homicides) are included in the database, and all victims within seven days of the mass murder are included in the victim count. Negligent homicides related to driving under the influence or accidental fires are excluded due to the lack of offender intent. Only incidents occurring within the 50 states and Washington D.C. are considered.

Methodology

Project researchers first identified potential incidents using the Federal Bureau of Investigation’s Supplementary Homicide Reports (SHR). Homicide incidents in the SHR were flagged as potential mass murder cases if four or more victims were reported on the same record, and the type of death was murder or non-negligent manslaughter.

Cases were subsequently verified utilizing media accounts, court documents, academic journal articles, books, and local law enforcement records obtained through Freedom of Information Act (FOIA) requests. Each data point was corroborated by multiple sources, which were compiled into a single document to assess the quality of information.

In case(s) of contradiction among sources, official law enforcement or court records were used, when available, followed by the most recent media or academic source.

Case information was subsequently compared with every other known mass murder database to ensure reliability and validity. Incidents listed in the SHR that could not be independently verified were excluded from the database.

Project researchers also conducted extensive searches for incidents not reported in the SHR during the time period, utilizing internet search engines, Lexis-Nexis, and Newspapers.com. Search terms include: [number] dead, [number] killed, [number] slain, [number] murdered, [number] homicide, mass murder, mass shooting, massacre, rampage, family killing, familicide, and arson murder. Offender, victim, and location names were also directly searched when available.

This project started at USA TODAY in 2012.

Contacts

Contact AP Data Editor Justin Myers with questions, suggestions or comments about this dataset at jmyers@ap.org. The Northeastern University researcher working with AP and USA TODAY is Professor James Alan Fox, who can be reached at j.fox@northeastern.edu or 617-416-4400.

This study was initiated by the administrator of a county jail in the Northern Plains of the United States who was concerned about the incidence of suicide behaviors in that facility, particularly among the American Indian population. It was a two-year project designed to evaluate the existing admissions suicide screening tool and to improve the instrument's cultural relevance for the American Indian population. The existing screening instrument used in the county jail to interview inmates at their intake was developed in New York. The main objective of the first year of the project was to determine if that instrument was culturally appropriate for the jailed American Indian population. The principal objective of the second year of the project was to determine whether the employment of different suicide screening protocols would make a difference in the responses of new detainees with regard to the likelihood of securing their honest reports of experiencing suicide ideation and its associated risk factors. For the duration of the project, all male and female inmates aged 18 and older who were booked into the jail went through the customary booking procedure that included the administration of the New York Suicide Prevention Screening Guidelines. In the first year of the project, researchers also administered a short self-report survey consisting of measures commonly associated with suicidal ideation. The self-report survey measured stress, anxiety, suicide ideation, hopelessness, and suicidal behavior history. The protocols in the second year of the project reflected efforts to test different screening conditions for four experimental groups and one control group of new detainees. The outcome variables of the short self-report survey consisted of measures of demographics, comfort experience during booking and the screening process, self-efficacy and management of depression, knowledge of mental health support available within the jail, and general well-being. In addition to the quantitative data collection, qualitative data were also collected to develop a straightforward assessment of suicide ideation criteria in this specific jail setting using semi-structured focus group interviews.

This dataset is about countries per year in South America. It has 768 rows. It features 4 columns: country, electricity production from renewable sources, excluding hydroelectric, and suicide mortality rate.

Historical chart and dataset showing American Samoa suicide rate by year from N/A to N/A.

The National Survey of American Life Adolescent Supplement (NSAL-A), 2001-2004, was designed to estimate the lifetime-to-date and current prevalence, age-of-onset distributions, course, and comorbidity of DSM-IV disorders among African American and Caribbean adolescents in the United States; to identify risk and protective factors for the onset and persistence of these disorders; to describe patterns and correlates of service use for these disorders; and to lay the groundwork for subsequent follow-up studies that can be used to identify early expressions of adult mental disorders. In addition and similar to the NSAL adult dataset (Collaborative Psychiatric Epidemiology Surveys (CPES), 2001-2003 United States), the adolescent dataset contains detailed measures of health; social conditions; stressors; distress; racial identity; subjective, neighborhood conditions; activities and school; media; and social and psychological protective and risk factors. Numerous variables from the adult dataset have been merged into the adolescent dataset, as the NSAL adult and adolescent respondents reside in the same households. Some of these variables apply to the entire household (i.e. region, urbanicity, and family income), while others apply specifically to the NSAL adult respondent living in the adolescent's household (i.e. adult years of education, adult marital status, and adult nativity [foreign-born vs. US born]). The immigration measures were asked of Caribbean black adult respondents only. No comparable measures assess the immigration and generational status of the Caribbean black adolescent respondents. The adult dataset measures are merged into the adolescent dataset to assist in approximating these measures for adolescent respondents. The NSAL adolescent dataset also includes variables for other non-core and experimental disorders. These include tobacco use/nicotine dependence, premenstrual syndrome, minor depression, recurrent brief depression, hypomania, and hypomania sub-threshold. Demographic variables include age, race and ethnicity, ancestry or national origins, height, weight, marital status, income, and education level.

Rank, number of deaths, percentage of deaths, and age-specific mortality rates for the leading causes of death, by age group and sex, 2000 to most recent year.

BackgroundWhen a person dies by suicide, it takes a reverberating emotional, physical, and economic toll on families and communities. The widespread use of social media among youth and adolescents, disclosures of emotional distress, suicidal ideation, intent to self-harm, and other mental health crises posted on these platforms have increased. One solution to address the need for responsive suicide prevention and mental health services is to implement a culturally-tailored gatekeeper training. The Northwest Portland Area Indian Health Board (NPAIHB) developed Mind4Health, an online gatekeeper training (90 min) and text message intervention for caring adults of American Indian/Alaska Native (AI/AN) youth.MethodsThe Mind4Health intervention was a multi-phase, single-arm, pre-and post-test study of users enrolled in the intervention that is available via text message (SMS) or via a 90 min online, self-paced training. We produced four datasets in this study: Mobile Commons, pre-survey data, post-survey data, and Healthy Native Youth website’s Google Analytics. The analysis included data cleaning, basic frequency counts, percentages, and descriptive statistics. Qualitative data were analyzed using thematic content analysis methods and hand-coding techniques with two independent coders.ResultsFrom 2022 to 2024, 280 people enrolled in the Mind4Health SMS training, and 250 completed the 8-week intervention. Many messages in the sequence were multi-part text messages and over 21,500 messages were sent out during the timeframe. Of the 280 subscribers, 52 participated in the pre-survey. Pre-survey data show that 94% of participants were female, and nearly one-fourth lived in Washington state, 92% of participants in the pre-survey were very to moderately comfortable talking with youth about mental health (n = 48). Most participants interact with youth in grades K–12. Post-survey data demonstrate changes in knowledge, beliefs, comfort talking about mental health, and self-efficacy among participants. Mind4Health improved participant’s skills to have mental health conversations with youth and refer youth to resources in their community.

While much of work on homicide-suicide (HS) arises out of the United States (US) and the United Kingdom (UK), there is a paucity of research on HS outside of the Anglo-American sphere. This paper investigates HS in Hong Kong (HK), comparing the subtypes of filicide-suicide (FS) and mariticide/uxoricide-suicide (MUS) in that context as a means of testing the generalizability of past studies. Data from the HK Special Administrative Region (HKSAR) government and the HK Police Force reports retrieved 156 cases from 2000 to 2019. In that timeframe, HS resulted in 261 deaths, with MUS being the most prevalent type of HS. Male offenders and female victims are more commonly seen. Offenders are generally older than their victims, and over half of offenders are married. FS and MUS display distinct characteristics in terms of offender and victim demographics, relationship dynamics, motives, and mode of killing. Depressed mothers tend to victimize their sons in FS as a means of saving their sons from a perceived miserable future, whereas male offenders aggressed upon their female partners in MUS to alleviate their own frustrations, subsequently dying by suicide out of sorrow or a fear of consequence. MUS offenders are more hostile towards their victims and tend to kill with aggressive means, whereas FS offenders are more likely to kill with altruistic motives and with minimal force. These results match patterns of MUS and FS in the Anglo-American sphere, but with some important differences in terms of the use of guns and the presence of altruistic killing.