Mealey's (February 11, 2019, 1:04 PM EST) -- PASADENA, Calif. — The question of whether a police detective should testify as an expert or a layman on a device used to extract data from a cell phone divided a Ninth Circuit U.S. Court of Appeals panel Feb. 6, with the majority finding no abuse of discretion in allowing the detective to testify as an expert witness in a child sex assault case (United States v. Tony Lee McLeod, No. 16-50013, 9th Cir., 2019 U.S. App. LEXIS 3752)....