That's called manslaughter... You don't get to walk when you rob a place and "accidentally" shoot someone. A sassy judge should ask "Did you accidentally rob the place too?"
To be more specific, involuntary manslaughter. Which is broadly speaking an accident that occurred while committing a crime. Or due to some other negligence. We are still firmly in the territory of accident, regardless of the legal consequences.
You still get punished for it... That's the whole argument. Even it's an accident, it's not the same kind of accident as turning a corner and spilling coffee on them.
The thread is not about whether or not whoever did it gets punished. The question is whether or not it was accidental or if damaging Merck was an intentional act. Based on the evidence so far, it sure seems like damaging Merck was a result of negligence and not intentional.