Can a witness give evidence about drugs transactions in progress that was never expected to be used against him in a criminal trial?

about drugs transactions in progress" that were never expected to be used against him in a criminal trial); United States v. Saget, 377 F.3d 223 (2d Cir. 2004) (concluding that a declarant's statements to a confidential informant, whose undercover status was not known to the declarant, were not testimonial within the meaning of Crawford). Because the taped statements did not constitute testimonial hearsay, the trial court did not violate petitioner's confrontation clause rights by admitting them.