Margaret finds out she’s been conned out of $80K, then lures Mike at the airport with an even bigger satchel of money, and then shoots him. But she doesn’t get her money back, and the rest of the crew still got their cut. But she also presumably got what she was looking for in the first place.
It’s pretty rare that someone is not able to make vocal sounds. There are people who cannot speak orally, but can still laugh, cry, and scream. They are not mute.
In the case of someone who does not speak orally, it is better to use the term for their actual condition. If it’s a brain-based disorder (post had trauma, or stroke, usually), it’s probably “aphasia.” If it’s location- or situation-specific, and an anxiety disorder, it’s probably “selective mutism,” which is, as far as I know, the only condition which is currently diagnosed, and uses the word “mutism.” People who have movement disorders that preclude oral speech have just that, and people with laryngectomies have just that. Autistic people who don’t have much usable speech are “echolalic only,” “single words only,” “four standard deviations below the mean for language use,” or whatever.
Deaf people are described using or not using oral “skills,” or “language.” Nearly every Deaf person, ever, even those with blindness or movement disorders, and even those with Deaf parents (because it is often a unavoidable part of the school curriculum), have been subjected to attempts to teach them oral language. Sometimes with success, usually without much. Regardless of actual success, though, there are reasons Deaf people have for not wanting to use oral language, or wanting to try. It’s no one else’s business. But making a choice not to, in no way renders someone “mute.”