MINNETONKA - Matthew Fischer and Whitney Dierks announce their engagement. Parents of the couple are Gary and Tammy Dierks of Chokio and Dan and Jan Fischer of Marshall, and Eric and Erin Fredericksen of Alexandria. Fischer is a 2009 graduate of Southwest Minnesota State University. Dierks graduated from SMSU in 2010. The couple plans a Sept. 6, 2014, wedding at Glenwood Lutheran Church in Glenwood.