BOSTON (WPRI) — Twelve suspects are facing charges for their alleged involvement in a high-end car theft organization. Massachusetts State Police, along with Brockton Police and the Massachusetts Attorney General's Office's Enterprise and Major Crimes Division, searched 11 residences and a garage across Brockton, Fall River, and North Easton on Thursday, Dec. 12. During the takedown, investigators seized firearms, large-capacity magazines, ammunition, and various pieces of evidence they say link the individuals to their alleged crimes, including key fobs, key programming devices, and clothing. Throughout the year-long investigation — called "Operation Hellcat" — the Office of the Attorney General said at least 63 vehicles were stolen, totaling more than $2.6 million. Courtesy: Office of the Massachusetts Attorney General The suspects worked in groups of two to ten to coordinate thefts at dealerships throughout Massachusetts and nearby states, according to officials. The group allegedly used Autel programming devices to create fully functional keys from blank key fobs. After breaking into the luxury vehicles, the suspects reportedly connected the device, allowing them to create a new fob within minutes. Investigators also learned that several suspects ordered firearm parts online, including sector switches, which are devices designed to convert semi-automatic guns to fully automatic machine guns. Twelve individuals, 11 from Brockton and one from North Easton, were arraigned in Brockton District Court. Officials said one person related to the investigation has an outstanding warrant and has not yet been arrested.