ALEXANDRIA, Va. — The chief financial officer of what had been one of the nation’s largest private mortgage companies has been sentenced to five years in prison for his role in a $3 billion fraud scheme.

Forty-one-year-old Delton de Armas of Carrollton, Texas, was CFO of Florida-based Taylor Bean and Whitaker until its 2009 collapse. He is the eighth person convicted in one of the biggest fraud schemes to emerge from the nation’s housing crisis, including company founder Lee Farkas, who received 30 years.