Deliberate ambiguity.
Author is obviously carefully adhering to a narrative.
How coincidental it is that the person on whom the coffee was supposedly accidentally spilled is now dealing with an accusation of sexual assault. From a now dead accuser, no less. She sure picked the right person on whom to accidentally spill coffee. Not a sympathetic victim in the least!
I think you have the order reverse. He spilled the coffee on him after he was accused of sexual assault, but found not guilty or something like that.