Ian Jackson wrote:
I'm sure it was all done with the best intentions. What probably
happened was that the police officer suspected that the husband's heart
rhythms had gone all twitchy, and he needed to apply a spot of instant
defibrillation to save his life.

Yes, very clever. When you only have a tazer at hand it probably is
a good choice. Over here one finds special-purpose electroshock devices
in many public places, and police officers often carry one in their car,
but not on their belt. So he must have figured the tazer was better
than nothing in this case.