'Trust me' is a tell. its instantly discrediting. someone trained in spycraft, interrogation and psyopping and propaganda would know this.
In interrogation, interviewing, intelligence analysis, and even courtroom psychology, explicitly asking for trust is often unnecessary when someone is credible. Because of that, phrases like
Trust me , Honestly , To be completely truthful, Believe me
are classified as credibility markers.
Why it can be a tell
People tend to say 'trust me' when they feel trust is in doubt
They think theyre not being believed, or they are trying to override skepticism, or they are compensating for weak evidence, or they’re managing perception, not facts.
In deception research this is called over explicit credibility signaling