The decision turned on timing and documentation. The ARB credited evidence that the termination recommendation was already underway before the driver reported that he had stopped driving because of fatigue and that the employer consistently tied the decision to unsafe conduct, not to the fatigue-related safety concern.
This matters because protected activity must have some connection to the adverse action. Even under the relatively low “contributing factor” standard, a complaint must play some role in the decision. Clear contemporaneous records showing what was known, when it was known, and why action was taken can help separate legitimate safety-based discipline from later claims of retaliation.