Professional conspiracy theorist Jerome Corsi is in Washington for more interviews with the special counsel investigation, ABC News reports.

He’s scheduled to testify for a second time before a grand jury on Friday, following up on a first appearance on Sept. 7.

The former Infowars Washington bureau chief has spent more time meeting with prosecutor’s from the special counsel office over the past few weeks, as people in the orbit of GOP provocateur Roger Stone continue to be questioned in the investigation.

ABC reported that prosecutors are interested in whether Corsi had advance knowledge that Clinton campaign chairman John Podesta’s email had been hacked by Russian government operatives in the run-up to the 2016 election.

Other Stone associates – including New York comedian Randy Credico and former madam Kristin Davis – have also been interviewed in Robert Mueller’s investigation in recent weeks.

Corsi attorney David Gray declined to comment.