Lowell Lehman, PhD. May 28, 1932 – April 10, 2019 Dr. Lowell “Chief” Lehman, 86, of Tahlequah, Oklahoma, died Wednesday, April 10, 2019. Born Leonard Lowell Lehman to parents Laurence and Ivy (Dent) Lehman, May 28, 1932... View Obituary & Service Information