The phrase "interrogation techniques" refers to different methods or strategies used to question and gather information from someone, especially in a formal setting like a police investigation. Full definition
At the time, waterboarding was among the enhanced interrogation techniques authorized by the Bush administration, a response to fear of continuing attacks after 911. (courant.com)
A Broward Sheriff's Office incident report confirmed the meeting, but didn't provide any specific response to Kashuv's claim that the deputy used interrogation techniques against him. (sun-sentinel.com)
By the time he leaves Iraq after that first deployment (he will return), Fair will have participated in or witnessed a variety of aggressive interrogation techniques including sleep deprivation, stress positions, diet manipulation, exposure, and isolation. (bookbrowse.com)