As Naomi says, this is an excellent senryu that has multiple possibilities to be considered.
Personally, I have an image of someone hurting someone else and asking the police that last-line question - a stupid and perhaps slightly unbalanced one considering the injury is bad enough for an ambulance to be needed.
That's how I read it, anyway, but it is the different possibilities that make this poem so chilling, simply because not a one of them is good.
S. A very powerful write within 3 lines with endless possibility as the others have already stated which makes the reader ponder and want more.
Fantastic job and one that I felt (and did) needed nominating.
This is too open-ended for me. Not in a bad way, though. It just makes my mind run amuck with different scenes that this could be in. Did she kill someone, is the government after her, did she get injured, ect. This is probably what you were going for. Provocation.