The database, in operation for 20 years, isn't audited, has attracted little attention and uses speculative criteria such as clothing and tattoos to designate people as members of criminal gangs.

Contractors lavished an Amtrak manager with $150,000 in cash bribes, luxury cars, vacations, and a pure-bred German shepherd ...

For 20 years, the state police have been quietly building a database of suspected gang members—and they’re feeding it to ...