Health care executive’s killer evades police for fourth day as backpack, DNA and bullets offer clues into his identity

Four days after a health care executive was shot and killed in Manhattan, police are piecing together clues, including a backpack, photos, video, ammunition, DNA and more, to help zero in on a suspect, who they believe is no longer in the city.

​ Four days after a health care executive was shot and killed in Manhattan, police are piecing together clues, including a backpack, photos, video, ammunition, DNA and more, to help zero in on a suspect, who they believe is no longer in the city. Read More Breaking News, Latest News and Videos | CNN