I'm not connected but I did look for you and saw a Chris Carstensen, b. July 1892 on the 1900 census for Asbury, Lawrence Co, SD. He was living with his parents, Nels Carstensen, b. 1858 in Germany. His mother's name was Dora. She was b. in Germany in 1865. They both immigrated in 1884, the same year that they were married. Chris was b. in South Dakota. Could this be your family?