Is your organizational culture one of suspicion?  Nothing damages relational trust and camaraderie more than the assumption of suspicion.  Instead we must strive to give our teammates and colleagues the benefit of the doubt.  Giving the benefit of the doubt FIRST says “I don’t know the reason, details or motives behind your words or actions, but I trust you anyways.”  After a while people will stop feeling unnecessarily guilty, sheepish and wrong.  Instead they will start relaxing and a culture of trust and honesty will develop.