. >> terrell carswell runs to the brawl. >> i heard somebody screaming. i jumped up and ran down.asn't thinking. when i got to him, moon's face was a whole other color. >> carswell tries to keep the 165-pound burden pinned down. it's not easy. >> i sat on him like this. he kept doing like this and twisting. i said, hold still, man, hold still. be still. >> they stopped burden from choking moon. another inmate grabs the radio and calls for help. >> you see them on the camera pick up the radio and say, "7 delta we need help." "7 delta we need help." which is really at that point the first alert to the rest of the staff that there's trouble in 7 delta. >> deputy lori garcia hears the distress call as she's going about her daily routine. >> it was transmission that was unlike what a deputy would transmit over the radio. so we knew that something wasn't right. we knew it had to have been an inmate. >> less than a minute later, deputy garcia and a group of officers reach pod 7 delta. >> your adrenaline is flowing and you walk in or run in, basically, and you don't know what you're going