John Malik
fact

In the last 5 years, police officers have killed 3,400 citizens who were not fleeing from them.

Believe
1
The Washington Post has been compiling a database of every fatal shooting in the United States by a police officer in the line of duty since January 1, 2015. The open-source database on Github tracks the following data: race of the deceased, the circumstances of the shooting, whether the person was armed and whether the victim was experiencing a mental-health crisis, and more than a dozen additional details. One metric is whether the person killed was fleeing from police officers. In 3,400 out of 5,400 instances (63%), the person killed was not fleeing.
Editor
John believes this point based on
WITNESSING
I saw their data sources of Killed by Police, Fatal Encounters, and police department records.
Sources
2015 to 2020 Police Shootings Data, The Washington Post, via Github, accessed June 15 2020
The Counted Database, The Guardian, 2016 and U.S. Census 2010 Population Data