Older case where Judge refused to grant a mistrial when the prosecutor asked the defendant while on the witness stand in front of the jury if he had ever sold any guns to Lee Harvey Oswald. See Par. 25
http://law.justia.com/cases/federal/appellate-courts/F2/451/1355/71500/
http://law.justia.com/cases/federal/appellate-courts/F2/451/1355/71500/
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