Follow-up showing how volunteering information to police can incriminate innocent people.
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To my other comment, let me add that this follow up video by Duane specifically addresses your scenario: the concerned parents of a missing girl unwisely spoke to the cops, without knowing they were suspects in the case (because the cops regularly suspect this, "9 out of 10 times, the caller is the one who committed the crime" as one cop put it). In this case, the cops suspected the father. After they found the body of the daughter, which had drowned, they didn't tell the father (because he was a suspect but they didn't want to read him his rights) and claimed to be still looking for her in order to continue incriminating her father. His mistake: volunteering to talk to the cops without a lawyer. Watch it here, I've picked the right timestamp for you: this video By volunteering to talk to the cops, you may also end up providing information that -- according to the cops -- "only the killer could have known". Oops! Even worse, if the interview wasn't taped (and in some cases, even if it was!) the cops can claim, either mistakenly or on purpose, that you provided self-incriminating evidence even if you didn't. Duane provides examples of how, even if your answers are taped but the cops' questions aren't , seemingly innocent answers can get you in trouble. Example: "I swear I've never touched a gun in my life" (cops: "we didn't mention the murder weapon, how did he know it was a gun? We didn't ask this. Suspicious!").