"A private accounting firm hired by the city to audit SCERS, however, was raising concerns about the lack of documentation and monitoring of such investments, records show. A new executive director, Cecelia Carter, also began asking questions when she arrived in January 2008. ... 'My initial reaction was to say to the staff there, 'Did we call the police?'' he said, referring to documents he recalls detailing Robertson's relationship with investment firms. He no longer remembers specifics."