The jurors also did not reach a decision on charges against the eighth employee, Dennis Foret.
The jury also failed to reach a verdict on charges against Cherlyn Petersen, who was found not guilty of two firearms charges last week.
Drexel's plea is expected to be entered once the firm reaches a final settlement on related civil charges filed by the Securities and Exchange Commission.
The nation's two largest producers of verbatim news transcripts have reached a settlement with the Federal Trade Commission on charges that they had an anti-competition agreement.
The Speaker's defensive news conference yesterday attested to the committee's independence as it reaches the point of voting on charges.
A seventh executive reached an out-of-court settlement on similar charges before the trial began.
Agreement was reached at the Summit on charges for Siberian overflights and putting an end to them.
He praised the jurors for reaching eight acquittals and six convictions on reduced charges.
A jury cleared him of possessing explosive substances, but failed to reach a verdict on other charges.
Mr. Neary said he could not understand how the jury could reach different verdicts on charges based on the same set of facts.