The indestructible cockroach of a scandal hasn’t died yet, no matter how many times Hillary Clinton stomps it with a sensible black pump: a new report indicates that the F.B.I. has possibly expanded their inquiry—perhaps a “full-blown investigation”—into her potentially improper use of a private e-mail server during her time as secretary of state.

Politico reports that the F.B.I. has seemingly moved past a preliminary inquiry stage and started conducting more interviews, a move that implies a “full-blown investigation,” according to F.B.I. former assistant director Tom Fuentes. “When you have this amount of resources going into it . . . I think it’s at the investigative level,” he told Politico.

Whereas the F.B.I. had only received a referral for investigation earlier this year (leading to a blowup between the Clinton campaign and The New York Times after the paper reported that she was being fully investigated), this time, according to Politico, the inquiry has expanded to the point that the F.B.I. is interviewing several tech people involved in the server’s setup: Platte River Networks, the company hosting the server; Tania Neild, a “technology broker” who connected Clinton with Platte River; a cloud-storage company called Datto; and several members of Clinton’s staff (though exactly which and how many staffers they’re speaking to is currently “unclear”). They’re also reportedly weighing an immunity deal for Bryan Pagliano, the man who oversaw the server but pled the Fifth during a September Benghazi committee hearing.

The F.B.I. did not comment to Politico on whether it had moved into a more rigorous investigation, but considering how explosive this situation is, they probably won’t comment until they either choose or decline to prosecute. VF.com has reached out to Clinton’s campaign, and will update this post if we receive word.