In exchange for leniency, untrained informants are sent out to perform dangerous police operations with few legal protections.Illustration by Luke Shuman On the evening of May 7, 2008, a twenty-three-year-old woman named Rachel Hoffman got into her silver Volvo sedan, put on calming jam-band music, and headed north to a public park in Tallahassee, Florida. A recent graduate of Florida State, she w