According to a study by PhD candidate, Travis Campbell, though Black Lives Matter anti-police protests resulted in a 15% to 20% reduction in police killings in the cities where BLM protested. This was dramatically offset by a 10% increase in murder rates.
The Daily Mail provides the details:
Travis Campbell, an economics PhD candidate at the University of Massachusetts, published his findings in a recent pre-print study examining the impact of BLM protests on police use-of-force incidents.
His analysis, which is still undergoing peer-review, found that cities with BLM protests had 15 to 20 percent fewer police homicides than expected if the protests had not taken place, equating to 300 fewer police killings nationwide over five years.
But, in a revised unpublished version shared with DailyMail.com, Campbell finds that cities with BLM protests also saw a 10 percent increase in murders overall, equaling 1,000 to 6,000 additional murders nationwide. […]
Campbell said his data suggested that BLM protests result in ‘less police effort and less proactive policing,’ which could explain both the decrease in police killings and the overall increase in murders.
Of course, Travis was not the first one to report this: