Greg Craig, the White House counsel for President Barack Obama, abruptly left his law firm as it has come under scrutiny from the special counsel’s investigation.

A spokeswoman for Skadden Arps confirmed to The Daily Caller News Foundation that Craig is no longer with the firm. She did not address whether his departure is related to Special Counsel Robert Mueller’s investigation.

The website Above the Law first reported on Tuesday that Craig’s biography had been removed from Skadden Arps’ website.

Skadden Arps has come under scrutiny because of its work with Paul Manafort, the former Trump campaign chairman, on behalf of the Ukrainian government in 2012. A team led by Craig helped produce a report that sought to justify the imprisonment of Yulia Tymoshenko, a political rival of Viktor Yanukovych, the Ukrainian president at the time and an ally of Vladimir Putin’s.