Mobile fingerprint scanners have been deployed widely to various law enforcement agencies throughout Los Angeles County. This investigative tool can do more than just capture a fingerprint; the devices work with mobile digital computers, and some devices are agnostic. Los Angeles County chose a solution that was light, very portable, and very fast, with a total number of 2,000 devices deployed. A limitation of the mobile fingerprint scanner for the County is that it currently only searches the AFIS managed by the Los Angeles County Sheriff's Department. This tool has had a significant impact in Los Angeles County, providing law enforcement with a piece of equipment that has enhanced officer safety, as well as community safety. This article discusses the deployment and impact of mobile fingerprint scanners in Los Angeles County.