Nine were tried, resulting in six acquittals and three mistrials. The rule for mistrials depends upon who sought the mistrial. None of the defendants were convicted, as there were several hung juries and mistrials. The same standard governs mistrials granted "sua sponte". After two more mistrials, federal agents discovered that the Kansas City mob was bribing jurors. Mistrials are the common response in cases where juror misconduct has occurred. Directed eight trials, engineered two mistrials. Despite two mistrials and an aborted third trial he was not convicted. The Gambinos also worked to compromise the heroin trial's jury, resulting in two mistrials. After two mistrials, the judge dismissed the remaining charges against the two remaining officers. Mistrials are generally not covered by the double jeopardy clause. Mistrials can be costly and thus will be avoided if possible.