But Scaletti is still terrified of being locked up in jail, which makes sense. A government witness who may testify against corrupt corrections officers could be in danger at the hands of those same officers. The source with knowledge of the case says Scaletti insisted on being placed in protective custody in a so-called safety cell. (According to a jail spokeswoman, safety cells are used to isolate vulnerable inmates -- police officers and informants, for example -- from the general jail population.) Corrections officials confirm that Scaletti is being held at the Turner Guilford Knight Correctional Center in west Miami-Dade, but would not say if he is in a safety cell.