Waterloo police are investigating an apparent murder over the weekend. Police says two men were shot outside a Waterloo home Saturday night. One of the men, 28-year-old Calvin Rash of Chicago, later died at a Waterloo hospital. The other man, 22-year-old Martavius Robinson of Waterloo, was taken to the hospital. Robinson’s condition has not been released. Police say they’re investigating the shooting as a homicide, but no charges have been filed, and police aren’t releasing other details.