A new study finds meerkats are the most murderous mammals. Frank Bienewald/LightRocket via Getty Images hide caption
murder murder
Ingmar Guandique is escorted from the Violent Crimes Unit by police in Washington, D.C., in 2009. Jacquelyn Martin/AP hide caption
Friends and family carry Pakistani social media celebrity Qandeel Baloch's body at her funeral. SS Mirza/AFP/Getty Images hide caption
Protesters demanding justice in the murder of environmental activist Berta Cáceres gather outside the prosecutor's office, in Tegucigalpa, Honduras, on April 5. Fernando Antonio/AP hide caption
Los Angeles Police Capt. Andy Neiman announced in March that a knife possibly linked to the murder of O.J. Simpson's ex-wife was undergoing forensic tests. Those tests have determined that it was not involved in the crime. Nick Ut/AP hide caption
Baltimore City State's Attorney Marilyn J. Mosby announces that criminal charges will be filed against Baltimore police officers in the death of Freddie Gray in Baltimore on Friday. Gray died in police custody after being arrested on April 12. Andrew Burton/Getty Images hide caption
Detective Mark Williams (right) speaks with an officer in Richmond, Va. A decade ago, amid a surge in violent crime, Richmond police were identifying relatively few murder suspects. So the police department refocused its efforts to bring up its "clearance rate." Alex Matzke for NPR hide caption
A full-grown male chimpanzee carries a stick at the Sweetwaters Chimpanzee Sanctuary in Kenya. The sanctuary is the work of primatologist Jane Goodall. Jean-Marc Bouju/AP hide caption
A photo released by the Eureka Police Department shows Gary Lee Bullock, who police arrested in connection with the murder of the Rev. Eric Freed. uncredited/AP hide caption
Amanda Knox listens to questions during her trial in Perugia, Italy, on June 12, 2009. Tiziana Fabi/AFP/Getty Images hide caption
This undated photo taken from the Kaufman County, Texas, website shows Kaufman County District Attorney Mike McLelland. McLelland and his wife were found killed in their house on Saturday. AP hide caption
