FBI officials obstructed the investigation into Hunter Biden’s laptop prior to the 2020 election by instructing agents not to further examine the laptop, whistleblowers purportedly told Wisconsin Republican Sen. Ron Johnson.

Federal authorities took the laptop from a Delaware computer repair shop in December 2019 after being alerted to its presence by the store owner. However, whistleblowers said local FBI leadership told employees not to look at the laptop for months and declared the FBI would not further change the election outcome, according to a letter Johnson sent Justice Department Inspector General Michael Horowitz Tuesday.

“These whistleblowers stated that local FBI leadership told employees, ‘you will not look at that Hunter Biden laptop’ and that the FBI is ‘not going to change the outcome of the election again,” Johnson wrote. “Further, these whistleblowers allege that the FBI did not begin to examine the contents of Hunter Biden’s laptop until after the 2020 presidential election—potentially a year after the FBI obtained the laptop.”