The Oklahoma "Make My Day Law" was signed into law over 20 years ago. No person who has done a righteous shooting under this law has had a civil lawsuit successfully filed against him/her.
Matter of fact that OK law is retroactive to cover one specific case that spawned the OK "Make My Day Law".
In OK the prosecutor is not required to take take a righteous shooting case to the grand jury. The wounded perp or his family can take up a petition for a grand jury hearing but that never happens. Okies are not moved to sign petitions on behalf of folks who get shot while committing a crime.