I try to avoid cop bashing, because I figure police populations are pretty similar to general populations wherever they are - around 80% decent people and 20% jackasses. Where I have a problem is with responses to incidents like this one - and not just by the police dept involved, but the DA's office and all others in that local government.
A police officer doing something negligent or stupid should be no different than any other citizen doing something negligent or stupid. For a case like this, what would the police and District Attorney response be if, say a guy was showing the neighborhood kids his new taser, being negligent and acting like it was a toy, and then accidentally shooting his neighbor's son and instead of calling EMS, just pulling the probes out himself and trying to minimize the incident? Would they look at giving him the equivalent of a three day suspension, or would they prosecute him for a misdemeanor or felony crime ? If the latter, the officer in this case should face the same potential criminal consequences (I'm sure the civil consequences cannot be avoided here).