The Tennessee Bureau of Investigation is looking into the conduct of a suspended Chattanooga police officer after an altercation last month with a Collegedale Wal-Mart greeter.

Officer Kenneth Freeman was placed on a 28-day suspension this week after an investigation showed he shoved and knocked down a 71-year-old Wal-Mart greeter while exiting the store on Christmas Eve.

The greeter told police he was trying to check the officer's store receipt, but Officer Freeman wouldn't stop. The greeter said he blacked out after Officer Freeman shoved him.

At the request of Hamilton County District Attorney General Bill Cox, the TBI began investigating the incident on Jan. 12, said TBI spokeswoman Kristin Helm. She wouldn't provide any more details about the investigation, except to say it was ongoing and the findings would be turned over to Mr. Cox's office for review.

An internal affairs investigation found Officer Freeman used excessive force. That report states that, after Officer Freeman knocked the greeter to the ground, he stood over the man and yelled, "Never put your hand on me" and "Don't touch me."

Officer Freeman was on-duty at the time of the incident, the report states. He said he stopped at the Wal-Mart with another officer to buy last-minute Christmas gifts.

For complete details, see tomorrow's Chattanooga Times Free Press.