Last scene of the movie *spoilers* so don't read if u haven't seen the movie
The very last scene shows Suzie getting the briefcase of money from Bill Murray lawyer guy and he says "less my usual fee" which implies they have worked together before.
Then, they show her walking away with the briefcase and him taking the drink that was on the table and drinking it. Does anyone else think she poisoned that drink too since she just killed Sam and now she has the money so she won't need him anymore? I must've seen this movie like 10 times and never noticed him taking the drink before but now I'm like - holy crap! Did she poison him too? It would make sense I think.