Two experiments explore the effect of law enforcement officers’ communication errors and their response strategies on a suspect’s trust in the officer; established rapport and hostility; and, the amount and quality of information shared. Students were questioned online by an exam board member about exam fraud (Nstudy1 = 188) or by a police negotiator after they had stolen money and barricaded themselves (Nstudy2 = 184). Unknown to participants, the online utterances of the law enforcement officer were pre-programmed to randomly assign them to a condition in a 2(Error: factual, judgment) x 3(Response: contradict, apologize, accept) factorial design, or to control where no error was made.