Las Vegas (CSI: Crime Scene Investigation and CSI: Vegas)
The Las Vegas team are scientists foremost, and follow the evidence. Las Vegas Police Department (LVPD) CSIs are not employed as police officers. The crimes the Las Vegas CSI team face (other than the standard murders, attempted murders, kidnappings, and rapes) include casino robberies, bodies found buried in the Nevada desert, and murders during different conventions at casinos.
Crime lab
The Las Vegas Metropolitan Police Department Crime Lab is a modern crime lab and shares a lot (but not a building) with the Las Vegas Police Department. It reports to the sheriff's office. In early episodes of season one the lab is frequently referred to as the number two crime lab in the United States, solving cases believed unsolvable. The lab consists of specialist laboratories, a larger office (usually used by the Grave Supervisor), a smaller office used by Catherine Willows between seasons 5 and 12, a locker room, an AV room, a break-room, and stairs leading to a second floor, housing offices for senior staff.
Miami (CSI: Miami)
The Miami team are detectives foremost, and mainly use theories to solve crimes. The crimes the Miami-Dade Police Department's (MDPD) CSI team face (other than the standard murders, attempted murders, kidnappings, and rapes) include drug running, murdered refugees from Cuba, bodies found washed up on the beach, bodies dumped in the Everglades, and crimes involving the rich and famous who have secrets to hide in their mansions and beachfront properties.
Crime lab
The Miami CSIs were firstly, stationed out of a broom closet next to the MDPD's bull pen. They were given their own building prior to the start of the third season. Originally dark and technical, this building housed Horatio's office, Megan's office, specialist labs, and a locker room. During the fourth season a government grant meant that slanted glass walls, multiple modern labs, an interrogation room, and a new locker room were all constructed. Horatio's office is not seen following the lab's reconstruction—although a state-of-the-art ballistics suite was added, acting as Calleigh's office. The lab has reinforced windows and shutters to protect against hurricanes and tsunamis.
New York City (CSI: NY)
The New York team are equally scientists and detectives, and frequently use criminal profiling (as well as evidence and theories) to solve cases. The crimes the New York CSI team face (other than the standard murders, attempted murders, kidnappings, and rapes) include organized crime activity involving the Italian Mafia, street-gang violence, and ethnic, cultural, and ability differences.
Crime lab
During the first season, the New York City Police Department (NYPD) CSI lab is in an old underground building with rustic brick walls. The lab houses Mac's office, a locker room, the autopsy suite, and specialist forensic laboratories. As of the second season the lab is on the 35th floor of a high-rise building in Manhattan. Equipped with glass walls and state-of-the-art equipment, this lab consists of the Supervisor's office (belonging to Mac, and – for a short time – Jo), specialist laboratories, an observation walkway, a break-room and kitchen, a locker room, and an office belonging to the Assistant Supervisor (first Stella, then Jo), containing an additional hot-desk used by Hawkes, Danny, Lindsay, and Aiden. Part of this second lab is blown up in the season three finale, "Snow Day", but is restored by the beginning of season four.
Washington, D.C. (CSI: Cyber)
The Cyber team focuses on the technical aspect of crimes, with NextGen forensics providing it with a real-world crime scene investigative counterpart. The FBI Cyber Crime Division investigates cyber-based terrorism, internet-related murders, espionage, computer intrusions, major cyber-fraud, cyber-theft, hacking, sex offenses, blackmail, and any other crime deemed to be cyber-related within the FBI's jurisdiction.
Divisions
— Cyber Crime Division The FBI Cyber Crime Division operates out of Washington, D.C. and is housed in the Cyber Threat Operations Center. The CTOC consists of Ryan's office, Russell's office, a communications bull pen housing the desks of Krumitz, Nelson, and Ramirez, a cyber lab, a glass walkway, and a 'tear-down room'. Due to their nomadic nature the team are often seen interviewing suspects at various FBI field offices and police departments.
— Next Generation Cyber Forensics Division The Next Generation Cyber Forensics Division is a lab-based facility within the Cyber Crime Division used for the processing of evidence in cyber-related cases.