The suspects participated in polygraph examinations. In order to comply with union regulations, the shop stewards were also included in the examinations. One employee failed the examination and, after interrogation, confessed that he and a co-worker had been behind the whole incident. The information that he supplied led to the arrest of the main culprit. It was ascertained that the two culprits were very unhappy with certain recent job promotions, the main culprit believing that he should have been promoted, but wasn't, as a result of prejudice towards him. Their shifts had also been changed suddenly, much to their dissatisfaction. A disciplinary hearing was held, led by a neutral and independent lawyer from a well known law firm. Both culprits were dismissed, for committing acts sabotage and intimidation.
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