MARSHALL - Heather Gass and Brock Nelson announce their engagement. Parents of the couple are Steve and Michelle Gass of Bird Island and Gary and Deb Nelson of Clara City. Gass is a 2006 graduate of BOLD High School in Olivia and 2010 graduate of Southwest Minnesota State University. She works as a claims representative for the Social Security Administration in Marshall. Nelson is a 2003 graduate of MACCRAY High School in Clara City and a 2008 graduate of North Dakota State University in Fargo, N.D. He works as the operations manager at Slumberland in Marshall. The couple plans an April 13, 2013, wedding in Marshall.