Explanation: This type of evidence is used in civil lawsuit where a civilian sues a corporation for injury or the possibility of injury due to unsafe working conditions / practices. In that case, the judgement is in favour of the party who submits a preponderance evidence, which is in fact more convincing than the evidence of the opposite party. Such a preponderance evidence is evidence based on possible accuracy and probability, not the amount of evidence. The amount of evidence is relevant and has effect in criminal cases.
Ithink he has to have proof of the unsafe practice that he is accusing them of and you should have a great lawyer that will be capable of properly backing him up.