Scott County Detention Center remained on lockdown Monday after jail officials reported a "credible threat" of weapons being brought into the facility. "The investigation is ongoing," said Michael Humphrey, the chief deputy jailer. "Nothing made its way in." The jail has been home to several high-profile inmates since last Tuesday, when Georgetown police charged five men with trafficking marijuana. During the arrest, police seized 366 pounds of processed marijuana and between $750,000 and $1 million in cash.