Third suspect emerges in deadly Seattle mass shooting, one alleged gunman found dead

Police now believe three suspects may have been involved in Sunday's mass shooting at Seattle Center that left three people dead and four others wounded, with a 15-year-old arrested in connection with the violence. One of the suspected shooters was among those killed in the violence, according to The Associated Press, citing a document filed in juvenile court in Seattle. While police previously said they believed there were two gunmen, the document revealed that the 15-year-old, along with an acquaintance found dead at the scene, may have engaged in a gunfight with at least one other unknown suspect.