There's no way anyone goes up on a murder charge for something like this. Manslaughter might be the most any prosecutor would try for, and it would get plead down. Be surprising if it even went that far, and likely only if someone with money or connections, on the side of the injured party pushed things. I really don't even see felony charges, maybe misdemeanor.
Doesn't make it any less sad, and I'm on my guys all the time. We are going to find the right or safe way to get the job done, or we aren't doing the job. I don't care what we get done in a day, just that we all get to go home at the end of the day.