Alice and Bob are having an argument on the internet about the Charlie and the Chocolate Factory adaptations- specifically which had better oompah loompahs. While Alice prefers the later ones from the Johnny Depp film, Bob very strongly likes the orange ones.
The argument becomes extremely heated and a cutting remark from Alice enrages Bob. Unbeknownst to Alice, Bob had a severe heart condition and the rage sends him into cardiac arrest. He dies minutes later.
When Mrs. Bob discovers him, she sees the full transcript of the debate. (i.e. for this hypothetical, all relevant facts are known and provable).
Could Alice face criminal charges and/or be found liable in a civil case?
Juristiction is the US, but they're in different states.