The gunman
The shooter has been identified as Connor Betts, 24, according to local and federal law enforcement sources.
At a Sunday afternoon press conference, police said they are going looking for any indication of a motive. "There is far too much information to review" before that can be determined, Biehl said.
During the execution of a search warrant, authorities found writings linked to Betts that show he had an interest in killing people, two federal law enforcement sources told CNN.
A preliminary assessment of the writings did not indicate any racial or political motive, the sources said.
Betts was wearing body armor during the shooting, Mayor Nan Whaley said.
He used a ".223 high-capacity" gun and had additional magazines, Whaley said. The .223 caliber is used in weapons such as the AR-15 assault-style rifle that has been used in previous mass shootings.
Nothing in Betts' history would have precluded him from purchasing the weapon, Biehl said. His history with law enforcement included traffic violations for speeding, failure to control and failure to yield.
The weapon used in the shooting was ordered online from Texas and transferred to the suspect at a local firearms dealer near Dayton, Biehl said.
