Unfortunately, there has never been an investigation of Biden. If there was, we would have solid evidence of his corruption, a Grand Jury and indictments. A forensic accountant would have a field day with Dad and Junior.
What are the Rats so afraid of? It didn’t bother them when the deep state tried to dig up dirt on Trump. They always say that the Biden criminal activity was a conspiracy theory by the conservatives and has been debunked. But there has never been an official investigation on the crime family. Basically a Mafia.