Manuel Medrano is a former member of the Arizona Mexican Mafia, also known as the New Mexican Mafia, a US prison gang. He was in and out of the Arizona Department of Corrections, Rehabilitation and Reentry for 20 years and served time for armed robbery and drug trafficking.
Rob Holmes is a private investigator. He works with major luxury-watch brands to track down fakes and stop them from getting to market.
Tyrone White was a member of the 65 Menlo Gangster faction of the Crips gang in South Central Los Angeles during the late '80s and '90s, witnessing police brutality and the LA riots. White speaks with Business Insider about the culture of the Crips and the rivalry with the Bloods.
Hondo Underwood is a former car thief. He stole hundreds of cars in and around Denver between 2016 and 2017.
Robert Mazur tells the full story of his time as a government agent investigating drug-money laundering. Mazur went undercover for the US Drug Enforcement Administration, the Internal Revenue Service intelligence division, and the Customs Service.
Alex Sanchez is a former high-ranking member of MS-13. He became involved in the gang in the 1980s in Los Angeles and participated in its expansion.
Pieter Tritton, a former cocaine smuggler, returns for a second interview with Business Insider about his experience trafficking drugs from South America to the United Kingdom.
Andy "Rebirth" Pellerano is a former soldier for the Almighty Latin King Nation, or Latin Kings, one of the largest and most dangerous prison and street gangs in the United States.
Jim Browning is a software engineer and an expert on scam call centers. His YouTube channel baits scammers by gaining access to their computers, observing them through CCTV, and hacking into their networks.