Vincent Cantu, who served eight years with the Pasadena Police Department, pleaded guilty Tuesday in federal court.

Cantu admitted robbing two La Habra banks last year and was suspected of robbing three others in 2005 and 2006. As part of a plea agreement, prosecutors agreed not to pursue the other alleged robberies.

The FBI called Cantu the "Polite Bandit" because he allegedly apologized to his victims. In one instance, prosecutors say, Cantu told a weeping bank teller that he is sorry but needed to take $10,000 for his son.

Cantu pleaded guilty to robbery and using a firearm during a crime of violence, which carries a sentenced up to life in prison.