The second report came to light when the city's law department turned over roughly 100,000 pages of documents to a City Council committee investigating the cameras. The Baltimore Sun obtained a copy of the second report in response to a public information request. The firm's first audit, obtained by The Sun in January, found a 10.6 percent error rate at 37 cameras. Its second report concluded that the error rate for those cameras and 38 others it examined — 75 in all — was 5.5 percent.