Kentucky v. Miller

approving a statewide plaintiff class of pretrial detainees, to be represented by two inmates of the Monroe County Jail, and a statewide defendant class of county sheriffs, to be represented by the sheriff of Monroe County | defendant class of sheriffs of 43 counties is sufficiently large to meet nu-merosity requirement for class actions | denial of class certification should not ordinarily be made without an evidentiary hearing | denial of class certification should not ordinarily be made without an evidentiary hearing | district court directed to certify defendant class of 42 sheriffs | certifying a defendant class of 42 members | defendant class of 42 public officials certified | defendant class of sheriffs juridically linked | same for notice to defendant class