Associated Press/Steve RuarkBaltimore State's Attorney Marilyn Mosby dropped all charges against the three remaining police officers in the Freddie Gray case on Wednesday, closing the possibility that any of them will be convicted of a crime in Gray's death. Despite the abrupt end to the case, Mosby said at a news conference on Wednesday that she stands by the position that Gray's death was a homicide. "We do not believe that Freddie Gray killed himself," she said. Gray, a 25-year-old Baltimore man, died in April 2015 after suffering a spinal injury that he is believed to have sustained in the back of a police van.