Surveillance cameras can have a huge impact on criminal cases. Temple criminologist Jerry Ratcliffe and his researchers are evaluating the city’s surveillance cameras owned to determine their value. "In forensics, criminologists are aware of the 'CSI Factor,' where it's increasingly difficult to convince a jury to find somebody guilty if it's not supported by forensic evidence," he said. "We may see a video factor, where people will find it harder to convict someone without video footage."