When someone is a “longtime police informant,” as the Seattle Post Intelligencer described Devaughn Dorsey, it means that person has had a long-term relationship with police and/or prosecutors in which the government has ignored his crimes, or lessened his punishment, in exchange for information. When that person also happens to be “one of Seattle’s most violent criminals . . . [who] has shot no fewer than eight people since 1990,” it illustrates the most troubling aspect of criminal informant use–that the government is tolerating crime from its information sources in pursuit of new cases. See this previous post —Violent robber-snitch formed new home invasion gang–discussing the dilemma of informants who continue to commit crime while working for the government.