David W. Mattern, age 32, of Mishawaka, formerly of Nappanee, died unexpectedly at 2:50 p.m. Wednesday, July 29, 2015, at his residence of natural causes. He was born June 11, 1983, in Elkhart to Dennis and Kathy (Bennett) Mattern. David was a lifetime resident of this area. He was a graduate of NorthWood High School …read more.