Explaining Anomalous CDF $\mu$ $\gamma$ Missing-E$_{T}$ Events With Supersymmetry

CDF recently reported an excess of events in the mu-gamma-missing E_T channel that disagrees with the Standard Model prediction. No such excess was observed in the e-gamma-missing E_T channel. We explain the excess via resonant smuon production with a single dominant R-parity violating coupling lambda'_{211}, in the context of models where the gravitino is the lightest supersymmetric particle. The slepton decays to the lightest neutralino and a muon followed by neutralino decaying to a gravitino and photon. We illustrate the effect by examining a representative parameter point which fits the Run I excess and we provide predictions for Run II and for the missing E_T and photon channel at Run I and Run II.