The office said Monday 44-year-old Onel Arana-Gervacio, a Mexican citizen, pleaded guilty in Hartford to conspiracy to distribute heroin and illegal reentry.
Prosecutors say Alabama police stopped a car hauler carrying a vehicle registered to Arana-Gervacio in 2016 and found a hidden compartment commonly used for contraband.
The car was tracked to Connecticut and Rhode Island.
Authorities say in January 2017, they seized $260,000 from the car and heroin, cocaine and drug distribution materials from the Hartford residence where it was parked.
Arana-Gervacio was removed from the U.S. in 2013.