Multiple news sources ranging from 2 years ago to now, such as CNN, NBC, New York Magazine, PBS, Salon, Vox, and NPR mention that between 2005 and May 2017, around 80 police officers have been charged with murder or manslaughter resulting from on-duty shootings. These sources consistently attribute a Philip Stinson's research. From NPR (last link):
Since 2005, Stinson says, 80 officers were charged with murder or manslaughter and just a third were convicted.
Since 2005, there have been 82 police officers across the country charged with murder or manslaughter resulting from an on-duty shooting. That includes 18 officers charged in 2015, 13 in 2016, and three charged with murder or manslaughter resulting from an on-duty shooting so far in 2017. ... In the past 13 years, only 29 officers have been convicted and most of those convictions were for lesser manslaughter offenses. Only one officer has been convicted of intentional murder during that time period.
This article isn't peer-reviewed (and peer-review isn't perfect). Furthermore, Stinson has not published such statistics in any scientific journal (peer-reviewed or not) despite publishing his article two years ago. I would expect such important results to be in the literature, yet cannot find any. Additionally, the Washington Post disagrees. From the Washington Post (emphasis added):
Among the thousands of fatal shootings at the hands of police since 2005, only 54 officers were charged, a Post analysis found. In the resolved cases, most were cleared or acquitted.
The Washington Post article included the names of the charged police officers and was published April 11, 2015. Even with the 2 year time difference between the Washington Post article and Stinson's article, the numbers don't match up. Assuming that both Stinson and the Washington Post are correct, 12 additional police officers will have to have been charged in 2015 after April 12, 2015, 13 officers in 2016, and 3 officers in 2017 before May 31, 2017. I could not find enough officers for this to be true.
Have 82 police officers been charged with murder or manslaughter "resulting from an on-duty shooting" since 2005? If yes, which 82 officers? (i.e. link to news article detailing charge for each officer. A good place to start is this Washington Post case summary detailing 54 officers. If the claim is true, 28 news links would be perfect.)
Have there been 29 convictions?
Were a third of all officers charged in a 12 year timespan (2005—2017) charged in just two years (2015—2017)?
From Stinson's estimate of 1,000 police shootings per year, there were an estimated 12,000 shootings between 2005 and 2017. 82 charges in 12,000 shootings would mean .683% of shootings result in a charge. In my mind, that is a very small number. Also, reason 2 is Washington Post found 54 charges between 2005 and 2015. If Stinson is correct, there were 28 charges in 2 years, which is more than half of all charges in the preceding 10 years. Was there an exponential increase in the number of charges? (As you can see, part of me believes the number to be higher. Part of me believes it to be lower.)