An accusatory statement is a way of pointing your finger at someone and saying, “I know you did it!” It shows someone you think they did something wrong.
The adjective accusatory is popular in murder mysteries. Screaming, "The butler did it!" is accusatory. Giving someone the evil eye is accusatory. Sometimes accusatory words or actions are obvious, and other times they're subtle. Any time you want to describe something that makes an accusation, call it accusatory.