Have him drive to the nearest police station and identify himself and place the call from there with a bunch of cops present.
Exactly. I mentioned this in an earlier post. It's fascinating how the OP and those who seem to be on the 'other side of the coin'* are more concerned with how the officers were justified than how they displayed so little imagination in finding a way to exercise the prerogative of the husband to authorize a forced-entry welfare check on his wife. The husband's fear under the circumstances was reasonable and correct as it turned out.
*An interesting title with built-in assumptions about which side most folks fall on.