Near the end of the movie Solo: A Star Wars Story, Tobias Beckett...
betrays Han and works with Dryden to deliver the coaxium. Once he realizes Dryden's mini-army has been disposed of, he shoots Dryden's guards and takes the coaxium for himself. He leaves Dryden, Han, and Qi'Ra there in the room.
I understand his reason for not leaving Chewbacca was,
because Chewbacca could carry his coaxium for him.
But why not kill the rest?
Tobias clearly had the upper hand, the others were defenseless, and he'd already proven himself disloyal to any of them.