The cops killed Eric Garner. Everything you need to know is on the tape. We can hear him screaming that he can’t breathe. We can see them not letting go of him or releasing pressure off his head and neck. We can see the illegal choke hold the cop had him in. We can also notice that he didn’t swing at any of the officers. So what clues are you searching for??? What investigation is there to do??? What don’t you understand???