BY ARIEL WESLER LOS ANGELES PUBLISHED 3:15 PM PT NOV. 19, 2021 In all her years on the force, retired LAPD Sgt. Cheryl Dorsey had never heard a story like this. “We were on the phone for sometimes 12 hours,” Dorsey said. “I developed a rapport with him, gained his confidence through a series of friendly interrogations and then before…