Domestic violence homicides are on the rise in many cities around the country, according to preliminary data from local law enforcement. In at least two major counties, they have doubled — a reversal of multi-year declines. Experts attribute much of the alarming increase to the social and economic pressures of the coronavirus pandemic. Annual national data on domestic violence murders is not released until well into the following year, but violent crime and homicides have increased this year in cities from Milwaukee to New York, and some cities are already reporting spikes in domestic violence homicides.