MARQUETTE, MI - Robert "Grizz" Davidson of Marquette, beloved father of Mark (Cathy) Davidson and Amy Davidson. Proud grandfather of Luke Behnke, Mark Davidson Jr., Jake Behnke, and Ellen Davidson. Loving brother of Donald Davidson. Dear uncle of James, Donald, and Jody Davidson. Beloved Professor of Criminal Justice at NMU, friend, colleague and founder of the band "100 Proof", passed away August 11, 2012 at age 67.