boarding trains. Criminal Investigations Division - The Criminal Investigations Unit is responsible for most follow-up investigations and the coordination of any criminal investigative efforts. This Division includes both investigators and detectives. Special Operations Unit - The Special Operations Unit (SOU) support Patrol operations by providing rapid response and enhanced capabilities to assist in keeping Amtrak passengers and employees safe. The SOU also conduct training on railroad-specific tactical response and procedures for fellow Amtrak Police Department members and external law enforcement partner agencies. Office of Intelligence and Analysis - The Office of Intelligence and Analysis serves as a support element for the different patrol divisions and seeks to increase the safety and security of the passengers and personnel by increasing the department's insight into ongoing threats and potential terrorist acts by the analysis and dissemination of intelligence information. Administration - The higher-ranking officers who are responsible for reporting the daily operations to the Amtrak Corporation itself, as well as the responsibility for overseeing the day-to-day functions of the department. Support Operations Divisions- Includes the Training Unit, Quartermaster Unit, a Police Technology Unit, and a Police Report Requests Unit. K9 Unit - The Amtrak Police Department K-9 teams provide a deterrent to potential threats from explosives. K9 teams are deployed at stations throughout the system as well as conduct train rides and right-of-way patrols. National Communications Center - Amtrak's National Communications Center (NCC) is the coordination center for the Amtrak Police Department. NCC Communications Officers answer calls and respond to text messages from the APD11 "txt-a-tip" system. The NCC also dispatches officers as needed to respond to incidents and events throughout the country. Rank structure and insignia Below is the rank structure for the Amtrak PD. Ranks are listed from junior (bottom) to senior (top). Controversies In 2016, the Amtrak Office of Inspector General launched an investigation into the then-Amtrak Police Chief Polly Hansen, regarding conflict of interest involving her boyfriend who was awarded a counterterrorism contract she helped oversee, and in whose award Hansen reportedly had influence. In statements, Hansen claimed no knowledge of the boyfriend, but the investigation revealed that they had been cohabiting in a condominium that they jointly owned. In September 2016, after the presidency of Amtrak had passed from Joseph Boardman (who had appointed Hansen in 2012) to Wick Moorman, Chief Hansen resigned. On February 8, 2017, Amtrak Police Officer LaRoyce Tankson shot and killed an unarmed