Be less stupid, lyingfish.
There are thousands of 'files' each DoJ inherits going back 100 years or more, that DoJ, after DoJ do not open and investigate. The casual name for that is Cold Case Files.
Biden and his DoJ never campaigned on opening them up, whereas Trump, his VP and his DoJ head and FBI head all did campaign on opening them.
It is beyond stupid that if Trumps DoJ today opens up a cold case file from 50 years ago for you to say there is nothing there because 'why did not all the DoJ's open them?'