If the reported description of audio and video is accurate, sounds like attempted murder.
Watch it yourself. There is a link to the video on the MSNBC website. It's grainy but you can see the kid on the ground, and hear the kid telling the cop, "I am unarmed we are on the same side." After which the cop tell's him to stand up. They kid tells the cop he is going to stand up, and as soon as he rises the cop shoots him. Good thing this cop is a poor shot or the kid's guardian angel is working overtime.