anonymous question

The system will work exactly as it does with a robber. Compensation for damages resulting from a murder will be demanded by those who suffered that damage. This is precisely why insurance companies play such an important role in theoretical developments regarding ancap: they suffer direct financial loss from the death of the insured person, and therefore, a developed insurance market will obviously lead to a reduction in the murder rate.

If one attempts to limit feedback to such archaic mechanisms as blood feuds, this also works, of course, but it looks rather primitive in modern society; more effective market mechanisms have been developed in our time.