she said she meant to use the taser on him and grabbed the wrong weapon. Is the grip that similar?
she had been there for several minutes holding him until the other cops arrived. I'm sure she went for the gun against him when she was the ONLY one there, and that makes perfect sense.
I think she was just startled when the other cop fired the tazer, and she just fired when they did, not really realizing they were firing tazer because she had tunnel vision. Kinda like in that Tattantino movie PULP FICTION... Bruce willis in the kitchen with the machine gun, travolta in the crapper... they have that awkward staredown until the toaster ejects the pop tart, and the noise instinctively causes Willis to fire the gun.
She just fired because the other dude fired. Happened fast, and then she realized he was using tazer and she wasn't. Only move then was to double down on the move, because it's prison time now. "I meant to do it!" an before video, her ass gets away with it. The blood streak all the way up the window kinda removes the claim the window was open lol.