John W. Dettmer, 58, of Bartlett and formerly of Broken Arrow, Oklahoma and the greater Chicagoland area. Cherished son of Lillian, nee Wanders and the late John F. Dettmer; dear brother of Donna Rennhack and the late Dawn and Debbie. John was a gun enthusiast and an avid Lord of the Rings fan. A memorial gathering will be held Saturday, November 2nd, at 230 N. Elroy Avenue in Bartlett from 10:00 am until noon. Burial of his cremated remains will be held at Wayne Township Cemetery immediately following his memorial. There will be a gathering back at the house following the graveside services.