"Winston L. Parker appeals the district court's . . . dismissal of his complaint alleging abusive discharge under Maryland law. Parker contends that his termination from employment violated a clear mandate of public policy."
"Under Maryland's common law rule of employment at-will, either party to an employment contract of indefinite duration can legally terminate the contract at any time. Penske's discharge of Parker for suspected drug use does not contravene this policy . . . ."
"We decline to extend the definition of public policy reflected in Maryland case law, consistent with our recognition that either the Maryland legislature or the Maryland Court of Appeals are the proper bodies for extending the situations for which an action for abusive discharge may lie."