Police are seeking an attempted murder warrant against Wilson in the shooting of Williams, Rausch said.
The Anti Defamation League notes that Aryan Nations 'borrows its name from the older neo-Nazi group of the same name but is a completely separate group'.
Police in Tennessee say a man listed in a database as an Aryan Nations gang member shot an officer and is on the run. "So when they go out into the exercise yard, they take off their shirt, then it's readily apparent who they belong to, what their rank is in the gang, and then that status that they're looking for". Rausch said the officer did not fire his weapon.
Knoxville Police tweeted shortly before 8 a.m. Friday that Williams has been released from the hospital.
Wilson, 31, was added to the Tennessee Bureau of Investigation's top 10 most wanted fugitives list early Friday, and a $2,500 reward is being offered for his arrest.
Police recovered Wilson's vehicle and are now searching for Wilson himself, whom they describe as "armed and extremely unsafe".
"If you see this vehicle, if you know this individual, do not try to intervene", Rausch said. "Call law enforcement and let us know where he is".
As both cars were still moving, Wilson fired one round from a shotgun, Rausch said.
Williams, a 14-year veteran of the Knoxville Police Department was shot in the shoulder during the traffic stop and is expected to make a full recovery, Rausch said. His Facebook pictures show he has a tattoo of a swastika and another which bears the words "White Pride Worldwide". He was convicted of aggravated burglary in 2011 and sentenced to three years in a state prison.
According to Knoxville Police, Wilson is a known member of the Aryan Nation gang.