Sp the FBI held this off for 10 months. Then it went public and they interviewed him. The only reason for the interview was he was going to the Senate but had to cancel for the FBI interview.
Don't be so cynical. They could have been interviewing him for a perjury trap and arrest him on January 21 if Biden is elected.
"According to this, you said you thought the meeting took place on Thursday. You later said that it might have been a Wednesday. We're going to throw away the key."
The point is that this video is being spread around social media (twitter, youtube, etc.), and finally getting the info out to the masses.
On-going investigation for 10 months? He’s probably the first guy they interviewed.