What party committed the massacre for the Valentine's Day incident?
Saint Valentine's Day Massacre
{'answer_start': array([-1]), 'answer_text': array([''], dtype=object)}
The case stagnated until December 14, 1929, when the Berrien County, Michigan Sheriff's Department raided the St. Joseph, Michigan bungalow of "Frederick Dane", the registered owner of a vehicle driven by Fred "Killer" Burke. Burke had been drinking that night, rear-ended another vehicle and drove off. Patrolman Charles Skelly pursued, finally forcing Burke off the road. As Skelly hopped on the running board, he was shot three times and died of his wounds later that night. The car was found wrecked and abandoned just outside St. Joseph and traced to Fred Dane. By this time police photos confirmed that Dane was in fact Fred Burke, wanted by the Chicago police for his participation in the St. Valentine's Day Massacre.