State Senator Dan Kotowski says he's stepping down from the Illinois Senate next month to become president of a nonprofit group that benefits at-risk children and families. Kotowski says his last day representing the 28th District in Chicago's suburbs will be October 5. The Park Ridge Democrat has held the seat for nine years. Kotowski will be president and CEO of ChildServ, which has offices in Chicago, Elgin, Naperville and Waukegan and also does work in Chicago's southern suburbs. The nonprofit provides family support groups and youth group homes, among other services.