Source: News reports, public records, social media and other sources

In 2015, The Post created a database cataloging every fatal shooting nationwide by a police officer in the line of duty, collecting data on those who were killed and details of the shootings. The effort began because data compiled by the federal government was unreliable and incomplete. The project was awarded the 2016 Pulitzer Prize for National Reporting.

This database is based on news reports, public records, social media and other sources. Read about our methodology. Download the data. See the 2016 and 2015 databases. Submit a tip.

Read more about the series at The Washington Post.