Whistleblower disclosures allege FBI procedures not followed in Hunter Biden investigation, sources say

Multiple Justice Department whistleblowers have come forward to Republican Sen. Chuck Grassley as part of his ongoing investigation into the Biden family business practices, according to three sources familiar with the matter, including a former Justice Department tax official.  

The sources told CBS News the whistleblower disclosures raised concerns about the Hunter Biden investigation, with allegations including "irregular handling" of evidence and a claim that "standard investigatory procedures were not being followed," allegedly hindering the probe's progress.

More specifically, whistleblowers said that during the FBI investigation, derogatory evidence related to President Biden's son, Hunter Biden, was wrongly labeled as disinformation, when it could be or had already been verified. In some cases, they claimed derogatory evidence was placed in highly restricted systems that prevented other FBI investigators from reviewing it in the course of their related work.