What a stupid question. She is stabbing him. What else could he possibly think she is doing, for --

Loud disembodied voices out of loudspeakers are always a bad sign. It means authorities. It means someone has seen something she doesn't want them to see. It means that rather than make him hurt more, her weapon of choice is slipping back into her pocket.

It means she's going to make one thing clear: "You're on your own. I was never here."