Olsen, a 2020 election denier with no prosecutorial experience, follows Joe diGenova, who left weeks ago saying he was pressured to bring charges without evidence.
Where the probe stands
- Legal theory: deprivation of rights under color of law, a civil rights statute.
- Former CIA Director John Brennan was subpoenaed to testify to a South Florida grand jury.
- Fired FBI agents compelled to testify say they would call the Mar-a-Lago search a "properly predicated" investigation.