Story highlights Kala Brown was found chained and wearing clothes inside a shipping container

Registered sex offender who owned the property was arrested, is not cooperating with police

(CNN) The deputy thought she heard banging.

She and her colleagues were out on a rural piece of South Carolina land Thursday morning, preparing to serve a search warrant.

She asked the other deputies whether they heard the banging, too. But it was hard to tell. It could have been just some noise coming from the woods, someone said.

The deputies listened more closely, and hearing it again they moved closer to a 30-foot-long shipping container and knocked on the side.

Inside Kala Brown, missing since late August, started screaming. "Help me! Get me out of here!" Spartanburg County Sheriff Chuck Wright told Ashleigh Banfield of HLN's "Primetime Justice."

Read More