Seventeen states have no rules or oversight mechanisms for local jails, according to Reuters research and a pending study by Michele Deitch, a corrections specialist at the Lyndon B. Johnson School of Public Affairs at the University of Texas. In five other low-population states, all detention facilities are run by state corrections agencies. The other 28 have some form of standards, such as assessing inmates’ health on arrival or checking on suicidal inmates at prescribed intervals. Yet those standards often are minimal, and in at least six of the states, the agencies that write them lack enforcement power or the authority to refer substandard jails for investigation.