(U.S. 2d Cir., Criminal Law & Procedure, Evidence, Sentencing) Defendant's drug conspiracy conviction and sentence are affirmed where: 1) a brief and fleeting comment on the defendant's incarceration during trial, without more, did not impair the presumption of innocence to such an extent that a mistrial is required; 2) the government never relied upon certain challenged testimony, and a curative instruction could easily have done more harm than good by focusing the jurors on two allusive references that they otherwise might have missed or construed as innocuous; and 3) defendant's sentence was unaffected by his juvenile drug offense.