Secretly tape-recorded admissions made to a foster son acting as a police agent, where the foster son denied being wired, are admissible where the conversation was between equals, the accused was not under compulsion, and the admissions were made in the exercise of a free choice to speak or remain silent. The denial of being wired does not constitute trickery sufficient to enliven the unfairness or public policy discretions where it did not give rise to any pressure or false state of affairs.
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