The story was generated by an investigation into public finance banker Calvin Grigsby's leasing companies in Miami and San Francisco. After reviewing his companies public records, the Bond Buyer found that revenues generated by the company, as well as public funds, were apparently funneled to public officials in Chicago, Los Angeles, and Alameda County (Ca.) as campaign contributions. Because Grigsby's other companies were used to contribute, his investment bank was not listed on campaign disclosures. In some instances, the officers of the company apparently violated regulations that restrict campaign contributions to public officials. Rule G-37 states that municipal bankers cannot contribute indirectly if they are barred from contributing directly.