We are peeling back the secrecy surrounding a growing number of cameras on our roads that are used to catch criminals. WPTV asked the sheriff's offices in St. Lucie and Martin counties how many license plate reader (LPR) cameras they operate. However, neither agency would disclose a number. Indian River County told us it operates 140 LPRs, which capture license plates and alert them to wanted vehicles.

License plate readers: Crime-fighting tool vs privacy concerns