Just one day before the hearing at the US house? very interesting. Why not let him talk if he was going to incriminate himself more? Somebody sure didn't want him to talk tomorrow...
That article says he was scheduled to testify before the House ("Bankman-Fried is scheduled to appear at a House Financial Services Committee hearing on Tuesday that will focus on his company's collapse") while refusing to testify before the Senate.
Your honor, my client confessed to the murder while in police custody, in fact -- we have it on tape. But we're not allowed to use it since it was not under oath. Shucks.