Lot's of conspiracy theorist style comments being made so lets look at this objectively:

1, "inside the car where she was a passenger, "contorted" her body and shot herself through the mouth" So she was able to get her hand cuffed arms in front of herself which would allow for control of a weapon.

2, Where did the weapon come from? Maybe it was in the patrol car, maybe she had it on her person.

Anyway flagged as irrelevant to HN.