Police spokeswoman Kris Mumford said investigators are looking into Ferrell's claim of self-defense. She said no arrests have been made. Ferrell had a valid handgun permit.
Michael Scott, who was among a group of friends with Mills, told WSMV-TV (http://bit.ly/IenblO) they attended a George Jones tribute concert Friday night and then went drinking at a couple of bars before the Pit and Barrel.
Mills, a native of Arab, Ala., toured with the Wayne Mills Band, which played college towns for more than 15 years. Country music stars Jamey Johnson and Blake Shelton, as well as American Idol winner Taylor Hicks, all opened for the band in their early careers, according to the group's website.
Mills graduated from the University of Alabama with an education degree, and also played football for the school, according to the band's website.
Pit and Barrel was to have been featured Sunday on "Bar Rescue" on the Spike TV, but the cable network decided to pull the episode, running a rerun instead, according to spokeswoman Shana Tepper.
The series features struggling bars and clubs that are given makeovers by a nightclub expert.