They were caught in Arizona in November following a nationwide manhunt.
Police said Juan Chach, 24, and Ignacio Chach-Aperez, 26, are responsible for the murder of Francisco Delazcruz-Coj, who was killed at his Willimantic home in November.
Police said they went to the apartment on Pulaski Court for a disturbance and found Delazcruz-Coj suffering from life-threatening injuries.
Juan Chach, who goes by “Chach,” was charged with murder and tampering with evidence. Chach-Aperez, who goes by “Nacho,” was charged with being an accessory to murder and tampering with evidence.