This freq is listed to Spbg County Ct House as a Fixed Link. KHM75 and KJ9776. In addition it is listed on page 7 of the 2011 Edition of the Upstate Scanner Frequency Directory for SCDC as a search / work release surveillance / hostage usage. This freq has been verified for SCDC surveillance usage in the Simpsonville area by ME. No info is listed for what you are hearing.