Whether a police officer's testimony relating an unidentified informant's out-of-court statement regarding the meaning of a phrase violated the defendant's constitutional right to confront adverse witnesses

QUESTION PRESENTED Whether a police officer’s testimony relating an unidentified informant’s outof-court statement regarding the meaning of the phrase “pulling a Carlos” — admitted pursuant to state evidentiary rules governing admission of expert testimony — violated Allison’s constitutional right to confront adverse witnesses. il