Thomas’ departure follows an independent review of the city’s handling of a series of events this year, including the deadly Aug. 12 white nationalist rally. The review, released Dec. 1, found several missteps on city officials’ part, Thomas included.

The review alleges that Thomas attempted to hide material from investigators and intentionally allowed the fighting in and around Emancipation Park on the morning of the rally so that an unlawful assembly could be declared.

But Thomas’ attorney, Kevin Martingayle, denied the allegations after a news conference detailing the review led by former federal prosecutor Tim Heaphy.

Martingayle declined to comment on Thomas’ resignation Monday. Thomas did not respond to emails.

Attorney and civil rights activist Jeff Fogel, who has feuded in the past with Thomas and other police officials over alleged police misconduct, said he wants more of an explanation for the abrupt retirement in light of unresolved questions about how the white nationalist rally this summer was handled.