A South Florida man faces a possible life sentence for fatally stabbing a Mexican migrant worker during a robbery.

A Miami-Dade County jury found Tyler Darnell, 29, of Kendall, guilty Monday of second-degree murder with a deadly weapon, armed robbery and attempted murder.

Authorities say Adan Castillo and a friend went out for a drink after their shifts at a south Miami-Dade County nursery in July 2009. As they were leaving Lili's Cafeteria, Darnell attacked the two men. Castillo was stabbed eight times, and his friend was also wounded.

A witness later identified Darnell as the attacker, and Darnell confessed during a videotaped statement.

Defense attorneys argued that the confession was coerced. The surviving friend returned to Mexico and did not attend the trial.