They pressed criminal charges but later dropped the charges, anticipating that the data would not stand up in court. Quote:

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"The federal Justice Department dropped charges against the Tecam Sea because officials said they weren't confident they could convict the vessel's owners of intentionally releasing bilge oil.

"The complete review of the evidence and expert reports and consultation with enforcement agencies indicated there was not a reasonable prospect of conviction," said Glenn Chamberlain, a department spokesman.

He declined to disclose details about the evidence or why it was thought to be lacking.
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