you are so hung up on something that you believe is doctored

How if it not true, are your going to quit of the company for false accusation

You are not even the HR, it their duty to check the credibility of the candidate. Your side jaga technical valuation

If he cant prove his worth, then extend the probation or dont hire him

But in your case and you already have such prejudice against him eveb before starting work, i suggest you delegate him to another team for impartiality sake