“It involves a female cop who appears to have accidentally shot and killed an innocent bystander who was running for his life to escape a mass shooter.” That girl is trigger happy ain’t she?
Accidentally - or mistakenly?
There's an important difference!
I can "accidentally" swallow one of my father's nitroglycerine pills because they were in a bottle standing right where my aspirins normally stand.
But if I take one of his nitroglycerine pills because I stupidly think nitroglycerine helps against headaches, then that is a mistake (based upon ignorance).
Regards,