nature.” Id. at 691, 98 S.Ct. 2018. Johnson correctly notes that this official policy can be established through only a single decision by a municipal policymaker. See Pembaur v. City of Cincinnati, 475 U.S. 469, 480, 106 S.Ct. 1292, 89 L.Ed.2d 452 (1986). Thus, theoretically, a decision to conduct a roadblock without the proper constitutional safeguards could subject a police department to liability. However, Johnson has not alleged facts that show that the putatively unlawful policy caused the violation of her rights. The Supreme Court has instructed that courts must carefully scrutinize the link between the allegedly improper conduct and the constitutional violation at issue. See Board of the County Commissioners v. Brown, 520 U.S. 397, 404, 117 S.Ct. 1382, 137 L.Ed.2d 626 (1997) (<HOLDING>). Here, Johnson’s rights were violated not
holding that liability under  1983 requires a causal link to and direct responsibility for the deprivation of rights holding causal link between alleged discriminatory remarks and adverse employment action insufficient holding that to show a causal connection the plaintiff must demonstrate a relationship between the misconduct and the plaintiffs injury holding that an intervening act of misconduct by the plaintiff can break the causal link between the protected conduct and the adverse employment action holding that a plaintiff must demonstrate a direct causal link between the municipal action and the deprivation of federal rights