Federal marshals in Ohio issued an arrest warrant on Friday to a former top financial aide to Chicago Mayor Rahm Emanuel.

The U.S. Marshal’s service issued the warrant for ex-city comptroller Amer Ahmad Friday morning, said Deputy U.S. Marshal Andrew Shadwick. In December, Ahmad pleaded guilty to federal conspiracy and bribery charges stemming from his time as Deputy Treasurer for the State of Ohio.

The feds want to arrest Ahmad for violating the terms of his bail, Shadwick said, but he would not release further details. Ohio Federal Judge Michael H. Watson ruled Friday that he would not unseal the contents of the arrest warrant.

Ahmad’s lawyer, Karl Schneider, did not immediately respond to requests for comment.

Following his guilty plea in late December, Ahmad and his family had continued living in Chicago.

Prosecutors say Ahmad abused his position in Ohio state government to steer lucrative state investment contracts to a former high school classmate who had gone on to work as a securities broker. As part of the scheme, the government says the broker, Douglas E. Hampton, funneled more than $500,000 to Ahmad and some co-conspirators via phony loans and a landscaping company that Ahmad partly controlled.

Ahmad has not been charged with any wrongdoing relating to his tenure as Chicago’s comptroller, from May of 2011 to July of 2013.

Ahmad has not yet been sentenced, but could face up to 15 years in prison. As part of his plea agreement, he’s agreed to pay more than $3.2 million in restitution.

A spokeswoman for Emanuel, Sarah Hamilton, declined to comment on news of warrant. The Chicago Police Department did not have an immediate comment Friday morning.

Alex Keefe is political reporter at WBEZ. You can follow him on Twitter and Google+.