According to officials with the Tennessee Bureau of Investigation, 1st Judicial District Attorney General Tony Clark requested the agency's assistance after a friend of the officer's wife accused him of assault.
An initial incident report filed with the Washington County Sheriff's Office states that the 26-year-old Telford woman went to a parking lot on Boones Creek Road Wednesday night to check on her friend, who reportedly was involved in a domestic disturbance with her husband.
The husband, an officer with the Johnson City Police Department, allegedly became irate with the friend, and according to statements made to authorities, pushed the woman and stomped on her left foot.
According to the incident report, the victim had "some bruising on her right upper arm and left foot" following the alleged incident.
The officer, who had not been charged with any crimes as of Friday, was not named in the report.
TBI officials got involved with the case after it first was turned over to the Jonesborough Department of Public Safety. WCSO officers handed off the case to Jonesborough police when they realized the alleged incident had occurred within Jonesborough city limits and was not in the county's jurisdiction.
At some point after the case was handed over to Jonesborough authorities, Clark requested the TBI take over the investigation.
"I'm not sure why we've been called in. For whatever reason, Jonesborough or someone felt it would be better for us to come in and investigate," said Jennifer Johnson, TBI spokeswoman. "Generally, we're called in to be an independent agency."
Once the TBI completes its investigation into the allegations, the agency's findings will be turned over to Clark, who will decide what, if anything, should be done. Based on his review of the case, Clark can choose to take no further action or to send the case to a grand jury.
As of Friday, the TBI's investigation was continuing. Johnson said the investigation could take anywhere from a couple weeks to more than a month.