If he has results, he can share them. Until he does, his posts are, indeed, nothing. Empty and not worth my time.
For example, if he learned you visited one of the dead last night and says “I know Kiku visted [insert name of dead] last night” you can now lie and say you visited them with something harmless.
If you answer first, and his result contradicts what you have to say, then you’re caught. If he answers first, you now have more information to come up with a plausible explanation.