Gun Violence Archive

Gun Violence Archive (GVA) is a nonprofit research group with accompanying website and social media delivery platforms which catalogs every incident of gun violence in the United States. It was founded in 2013 by Michael Klein and Mark Bryant. Klein is the founder of Sunlight Foundation, and Bryant is a retired systems analyst.
Website.
GVA contains a database of known shootings in the United States, gleaned from 6,500 law enforcement, media and government sources.
GVA's methodology and definitions are found on the organization's website.
History.
GVA was established in 2013, to provide verifiable gun violence data and statistics for the ongoing national [US] gun debate. Gaps in both CIA and FBI data, as well as their lagging distribution, showed a need for near real-time data collection.
GVA has a staff of 20 professionals, with specialities from MSLS/MIS-degreed researchers and data archivists to systems architects and software engineers.