DNA databases allow law enforcement to identify individuals by their DNA profiles. The largest DNA database is the FBI's CODIS database. DNA databases can help identify suspects in crimes and exonerate innocent convicts. However, they also raise privacy concerns about who has access to DNA records and how securely the records are stored. Surveillance, such as CCTV cameras, can help lower crime rates but also infringe on privacy by monitoring behavior without consent. Reliability, security, and control over personal data are ongoing issues with DNA databases and surveillance technologies.