Nothing, hah! Surely you mean when he had to painstakingly admitted, that although it's never been for want, there's no evidence of malfeasance involving POTUS Biden.
Hahaha....you're a funny cat. One thing lots of folks don't realize about pardons....it nullifies any need or ability to utilize a person's 5th Amendment right. One cannot incriminate themselves if they're above incrimination....they CAN, however, be locked up for refusing to testify fully and truthfully. Hope you're well, happy and safe this holiday weekend. Take care!!