Mark Lewis Demler, born June 9, 1959, passed away at home Sept. 26, 2025, reuniting with his beloved parents, Barbara Jean (Dale) Tarr and John Lewis Demler; his cherished wife, Betty; his brother, Michael Ross Tarr; and his nephew, Nicholas Micheal.

A proud Boys Town graduate of 1977, Mark soon answered the call to serve in the US Marine Corps. After his medical discharge, he embraced life as a true jack-of-all-trades, always eager to lend a hand or try something new. Mark’s passion for music filled many joyful jam sessions, and his artistic talent left a lasting impression on those around him. He is lovingly remembered by his only child, Traci Nicole; granddaughter, Kaitlynn; sister, Dea Hamburger and her husband, Tom; and brother, Patrick Tarr. Mark’s legacy also lives on through his nieces, Stacy Sands, Jessica Turner, Daisy Dahlquist, Stormy Khuc, Brittani Tarr, Akasha Tarr, Amberdawn Tarr and Cori Tarr; as well as his nephews, Joe Fishler, Chris Fishler, Jeremy Fishler, Zack Rudy, and Ricky Tarr. He is also fondly remembered by a large family of great-nieces,nephews, and friends.