Commonwealth v. Chmiel, D., Aplt.

[J-63-2020] IN THE SUPREME COURT OF PENNSYLVANIA EASTERN DISTRICT SAYLOR, C.J., BAER, TODD, DONOHUE, DOUGHERTY, WECHT, MUNDY, JJ. COMMONWEALTH OF PENNSYLVANIA : No. 780 CAP : Appellee : Appeal from the Order dated May 13, : 2019 of the Court of Common Pleas of v. : Lackawanna County at No. CP-35-CR- : 0000748-1983 DAVID CHMIEL : : Appellant : SUBMITTED: July 14, 2020 OPINION CHIEF JUSTICE SAYLOR DECIDED: October 21, 2020 In this serial, capital post-conviction appeal, Appellant challenges the validity of expert testimony based upon microscopic comparison of hair samples. For more than a…