Subject: Re: How true is this?
So, if it is found by the special counsel investigation that Biden committed some crime related to his holding classified documents in his private residences as veep, those could be impeachable offenses now as pres?

I mean - maybe? The Constitution doesn't say that every crime is an impeachable offense - only "high crimes and misdemeanors." So it would probably depend greatly on whether Congress felt any specific crime meets that standard.