The problem is that those are not typically accusations, those are reported emergencies.

If you see your neighbor, for example, actively trying to kill his wife during a domestic incident, the last thing the police should do is sit on that report and carefully investigate whether that is true. They should act, because it might be a life or death scenario.

What logically follows, is that false reports like this should come with very heavy punishment. I would say at least as grave as attempted murder.