Police Chief Ron Murtaugh says two men, believed to be Hispanic, broke into the unit and demanded money. Both men had their faces covered and were armed with handguns.
In the process of a robbery 42-year-old Aimee Kearns was shot to death.
Chief Murtaugh says she was pronounced dead at the scene. Another person inside the unit was not injured.
Ralston police do have a description of the get-away vehicle. They are looking for an older model light blue Lincoln Continental or Ford.