A new study released Thursday suggests that two major data sources used by federal officials to tally police homicides — instances in which a police officer fatally shoots someone while on the job — dramatically undercount the number of deaths. Researchers from Harvard and Northeastern University found that the number of police homicides, also known as "legal intervention deaths," recorded by the FBI's Supplementary Homicide Reports (SHRs) undercounted the number... (GunPolicy.org)