"Please do not spread further misinformation about the case."
Let's assume that most people are giving their opinions to their best knowledge. We shall be careful when telling someone to stop spreading misinformation as this is how fascism starts. "I am right, you are wrong, stop talking!"
Calling everything that's at odds with ones beliefs misinformation is stupid in the first place. And I believe the word is used precisely in this sense most of the time. Definitely here.
But in the particular case, the discussion centers around a matter of opinion on "should trust be extended to this particular set of statements from a known deciever".
Throwing around accusations of spreading misinformation to further your opinion in an argument makes it harder to call out real misinformation.
Did you ever say such thing to someone who committed an error?
How would you feel if someone (your partner, your colleague, your boss) told you such thing?
Let's assume that most people are giving their opinions to their best knowledge. We shall be careful when telling someone to stop spreading misinformation as this is how fascism starts. "I am right, you are wrong, stop talking!"