Ralph Greer established a Fourth Amendment violation by several individual supervisors after being discharged from his position with the Detroit Department of Water and Sewage (DWSD) when he refused to submit a drug test to the company. The Construction Inspector was selected for reasonable suspicion drug testing after a news reporter claimed to take photographs of a black male rolling a marijuana cigarette while sitting in a DWSD-owned vehicle. Because the photographs were never produced, the Court held that uncorroborated anonymous tips, standing alone, cannot form the basis of a reasonable suspicion test against a public employee.

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