The attack Sunday morning lasted only minutes. But the anger behind it may have been building for months, if not years.
"It appears that what brought him to this horrible event was his lack of being able to obtain a job, his frustration over that, and his stated hatred for the liberal movement," Knoxville Police Chief Sterling Owen said of Adkisson.
A police affidavit used to get a search warrant for Adkisson's home said the suspect admitted to the shooting.
Adkisson "stated that he had targeted the church because of its liberal teachings and his belief that all liberals should be killed because they were ruining the country," investigator Steve Still wrote.
Adkisson was a loner who hates "blacks, gays and anyone different from him," longtime acquaintance Carol Smallwood of Alice, Texas, told the Knoxville News Sentinel.
Authorities said Adkisson's criminal record consisted of only two drunken driving citations. But court records reviewed by The Associated Press show that his former wife obtained an order of protection in March 2000 while the two were still married and living in the Knoxville suburb of Powell.