Investigators with the state attorney general’s office have subpoenaed Bank of America Corp. in connection with the sale and marketing of troubled mortgage-backed securities to California investors, according to a person familiar with the probe. The state is trying to determine whether the bank and its Countrywide Financial subsidiary sold investments backed by risky mortgages to institutional and private investors in California under false pretenses, according to the person, who was not authorized to speak publicly and requested confidentiality.