article_snippet: the FBI defines two types: .
article_snippet: CNN has not analyzed each case and cannot authenticate the group's findings.
article_snippet: the nonprofit Fatal Encounters started collecting the data in 2013.
article_snippet: the nonprofit Fatal Encounters source of information is different from the FBI's.
article_snippet: the nonprofit Fatal Encounters's founder, Brian Burghart, said The figures create a toxic environment for police, as well as suspects.
article_snippet: CNN's Michael Martinez contributed to a report released in December.