An essay is presented essay on the U.S. Federal Rules of Evidence 703 and 705. It discusses issues related to the U.S. Supreme Court cases Melendez-Diaz v. Massachusetts and Crawford v. Washington. It informs about the 2000 amendment to Rule 703, which makes non-disclosure of the hearsay basis of a forensic expert's opinion the default position. It adds that Rules 703 and 705 are problematic as evidence rules in criminal cases.