Each year, about 1,000 police shootings result in fatalities, according to criminologist Philip Stinson of Bowling Green State University. But in the 12 years between 2005 and 2017, just 82 police officers were charged with murder or manslaughter for an on-duty shooting -- and only 28 of them were convicted.

So it's especially remarkable that recent weeks have seen the convictions of officers in two different high-profile shooting cases.

Earlier this month, a jury found Chicago police officer Jason Van Dyke guilty of second-degree murder and 16 counts of aggravated battery with a firearm in the fatal shooting of 17-year-old Laquan McDonald. In late August, a Texas jury's decision led to a 15-year prison sentence for a former police officer in the fatal shooting of 15-year-old Jordan Edwards.