Johnson v. Alaska

(1) Whether the confrontation clause prohibits the prosecution from introducing into evidence at trial a certified lab report reflecting statements of nontestifying analysts through a surrogate expert who, although a supervisor at the lab, merely reviewed the report and results and did not conduct or observe any of the underlying tests; and (2) whether the confrontation clause prohibits the surrogate expert from testifying at trial about the underlying tests, including the particular samples tested, procedures followed and results reached.