Good cop/bad cop
Good cop/bad cop was an interrogation method named for its use by law enforcement, in which one party approached a suspect sympathetically and another used a hostile approach.

In preparing to question ensigns Zier and  in 2259, Lieutenant La'an Noonien-Singh claimed "bad cop" to Lieutenant Commander Una Chin-Riley's good cop. Chin-Riley's method included relating to Zier and offering her coffee, while Noonien-Singh's demeanor left Ensign Christina crying. ()

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Legal procedures