In the six months since the Greenville County (SC) Sheriff's Office's Internet Crimes Against Children (ICAC) unit was established, the department has served 143 warrants and made 21 arrests of 17 people, including one arrest that led to the uncovering of one of the largest caches of child pornography in South Carolina history, Sheriff Will Lewis said Monday.

Lewis said the cases investigated involved male and female victims ages 2 to 18. One case in particular involved a toddler being forced to perform sexual acts on a dog, he told GreenvilleOnline.com after announcing the arrests. 

According to Lewis, ICAC was established Jan. 3 and has five investigators to the unit. The unit works alongside the South Carolina Attorney General's Office and the Department of Homeland Security to solve cases of crimes against children.