The conversation about this would be even more gripping had the officer thrown down a handgun, instead of having interfered with the integrity of the crime scene by moving the location of the tazer.
The act of moving the tazer also calls into question the Officer's understanding of the law. I mean it would have been a fairly poor attempt at a defense to say the Officer was in fear for his safety from a fat man, 35 some feet away, heading in the other direction, holding a tazer whose cartridge had already been discharged, and whose range is less than that distance. I guess maybe he could have tried to make some argument that the suspect was moving towards his unsuspecting partner while wielding the generally non-deadly weapon, but that maybe it could have been used to disarm the partner, but even that would be pretty damn silly as the correct action would have been to radio the partner of the circumstances and to have warned the deceased to have dropped the device. In addition to the criminal, this Officer had a whole lot of stupid going on. Of course there has always been a high correlation between criminality and stupidity, at least for the criminals we become well aware of.