Explosive device defused

The explosive device was located next to the trash can near the picnic table in foreground.

Shelbyville police detective Sgt. Brian Crews, left, and Tennessee Bureau of Investigation agent Caleb Utterback watch as Tennessee Highway Patrol bomb expert Aussie Thaxter discusses the situation by cell phone.

TBI agent Caleb Utterback, left, positions a rock against which the homemade explosive device will be set off as THP bomb expert Aussie Thaxter watches.

From left, Shelbyville police detective Lt. Pat Mathis, TBI agent Caleb Utterback, SPD detective Sgt. Brian Crews and SPD detective Charles "Chucky" Merlo watch THP bomb expert Aussie Thaxter prepare to explode the device.

THP bomb expert Aussie Thaxter has placed the homemade explosive device into a metal tube next to the rock and prepares for detonation.

From a safe distance, THP bomb expert Aussie Thaxter is ready to set off the explosives-filled tube. A loud "bang" and puff of smoke followed.

From left, TBI agent Caleb Utterback, Shelbyville police Lt. Ricky Blanton, Shelbyville officer Rod Stacy, Shelbyville detectives Charles "Chucky" Merlo, Sgt. Brian Crews and Lt. Pat Mathis and officer Todd Sanders look over the remains of the explosive device with THP bomb expert Aussie Thaxter.

THP bomb expert Aussie Thaxter photographs and sizes the device.

Standing from left, Shelbyville police Lt. Ricky Blanton, TBI agent Caleb Utterback and Shelbyville detective Lt. Pat Mathis watch THP bomb expert Aussie Thaxter at work.

A close look at what was left of the explosive device.

Shelbyville police detective Lt. Pat Mathis photographs the device.

Shelbyville police officers Todd Sanders, left, and Rod Stacy search the Fisherman's Park area for additional evidence. Nothing else was found, police said.

Andy Feldman, left, an Illinois visitor who discovered the homemade explosive device, talks with Detective Sgt. Brian Crews of the Shelbyville Police Department.