sentences:  In "Pembaur v. City of Cincinnati", the Court held that a single decision made by municipal policy maker can establish policy sufficient for Monell liability.In determining who is a municipal policy maker in "City of St. Louis v. Praprotnik" (1988), the Court held that if an official has final policy-making authority and is responsible under state law for making policy in that area of city's business, he or she is a municipal policy-maker.Regarding policies of omission, the Court held in "City of Canton v. Harris" that a municipality can be liable for a failure to train its employees when this failure constitutes a deliberate indifference to the person whose rights were violated.