I know mom has wanted to do this to some of her patients, but I also know she hasn't:

A nurse turned down an audio alarm on an AIDS patient's vital-signs monitor and failed to notice when the man had a heart attack and died, county officials said.

The thing that makes this extra-special dumb is that if a nurse really wants to kill someone, they have a gigantic number of nearly undetectable ways to do so. Stupidity really does sometimes kill.