Santo Rivera who is a member of Romeos crew is played by Senen Reyes. Senen Reyes better known as Sen Dog from the hip-hop group Cypress Hill.
Visitors to county jails in California sit behind a thick glass window and talk to the inmate via telephone. All the calls are recorded (the lone exception is a conversation with an attorney) and can be used as evidence. There is no unrecorded face-to-face meetings with visitors at a table as depicted throughout the series.