S14, E10: Arnold Zachary, owner of a successful clothing factory, is found beaten to death in his office. Even though he ran a "sweat shop," he was much more pleasant than most bosses and his employees were not disgruntled. A security tape shows the killer arriving and leaving but it's difficult to see his face. But Detectives Briscoe and Green canvass the employees to see if there were any problems. One of his workers, Maria Villanueva, just had a baby and had a longer than usual maternity leave. They talk to her and Briscoe holds the baby, who drools on his shirt, therefore supplying the DNA to determine the victim is the baby's father. Now they think Maria's boyfriend, Miguel Comacho, is the killer for obvious reasons. They pick up Miguel and his English isn't very good but he's still mirandized in English and then confesses to killing Arnold.