Federal officials have determined the three men accused of shooting and killing a Manassas man in May are illegal immigrants.

One of those three, Sebastian Cortes-Hernandez, 24, also known as “Onion” and “Cebolla,” returned to the United States after being deported to Mexico in 2003.

On May 31, Omar Florencio-Vazquez, 24, was at the Grant Avenue Shopping Center in Manassas with two of his brothers and a cousin when they spotted a group of 12 men they had been in a fight with two weeks earlier, court records show.