John Richard Kleffner

John Richard KleffnerDec. 9, 1947 - April 3, 2021 Our beloved brother, uncle, and friend, John Richard Kleffner, died April 3, 2021 at the University of Colorado Anschutz Medical Center as a result of Stevens-Johnson Syndrome T.E.N.S. We have lost a great man. John was born Dec. 9, 1947 in...