We do see the victim running away with Taser barbs hanging from his back.
Clearly, after he wrestled the taser from the bewildered and terrified officer, this master criminal made one fatal mistake. He fired his new found weapon, but while doing so spun around to launch a devastating karate kick at the cop, leading to the taser barbs hitting him in the back instead. Ignoring the barbs with his super-human power of blackness, he then ran from the cop in order to gain some distance so he could launch a flying kick and finally take out his brave but clearly outmatched opponent.
None of this was caught on video, of course, as the person shooting the video was black and they're not to be trusted because Al Sharpton.
What we're really seeing on the video is an almost miraculous recovery by the cop where he gets off a lucky shot or eight while his assailant is vulnerable in the only way black people are ever vulnerable...when their back is turned as they run away in preparation for a killing strike.
Of course the "murder" charges will probably stick because political correctness reverse racism Jesse Jackson liberal media.