Police Chief Chris McKenzie says investigators are looking at whether what he called domestic issues may have been the motive for the rampage Sunday in the town of Carthage.
Police say 45-year-old Robert Stewart killed seven residents and a nurse at the Pinelake Health and Rehab center and wounded three other people.
The injured included a police officer credited with ending the rampage when he confronted and fired on the gunman, who was also wounded.
