Tulsa police officer Betty Shelby is just one of 14 officers since 2005 who have been charged with murder or manslaughter following fatal on-duty shootings after shooting and killing Terence Crutcher.
According to The Guardian's database The Counted, 1,146 people were killed by police in the U.S. in 2015 alone. The Washington Post's database puts that number at 990. Data on people killed by police officers varies greatly because the U.S. government does not have comprehensive records about law enforcement deaths.
Less than 1 percent of officers are convicted of murder or manslaughter while 90 percent of civilians are. This vast disparity has sparked a debate on why police aren't held accountable for these killings.
For one, initial investigations in police-involved deaths have to prove they killed the victim knowingly and intentionally, without justification or provocation. This can easily turn into a "he said, she said" debate between the officer and often grainy dashboard or body-cam footage.
Additionally, 14 states have a "bill of rights" for officers providing large swaths of protection not provided to citizens.
Even though Betty Shelby was charged with manslaughter, this does not mean she was found guilty. She is in the less than 1 percent of officers that are charged for killing a citizen, but she may or may not become a part of the even smaller percentage that are ever convicted.