Two former accounting executives at Stanford Financial Group Co. should be convicted of helping Texas financier R. Allen Stanford conceal the theft of billions of dollars from investors at his offshore bank, U.S. prosecutors told a Houston jury.

The government asked jurors to reject claims by ex-Chief Accounting Officer Gilbert Lopez, 70, and former Global Controller Mark Kuhrt, 40, that they were duped by Stanford and his finance chief into creating false financial statements, which investors relied on to buy $7 billion of fraudulent certificates of deposit from Antigua-based Stanford International Bank Ltd.