Philly's former top cop is heading back to his former department and native city of Chicago to assist Mayor Rahm Emanuel in reshaping the department.

Former Philly police commissioner Charles Ramsey, who previously served as commissioner of police in Washington D.C., was a top-level deputy commissioner in the Chicago Police Department, where he began his career as a patrolman.

Emanuel made the announcement Sunday, calling Ramsey "a national leader in urban policing," the Chicago Tribune reported.

The department was roundly criticized over the fatal shooting by police of teenager Laquan McDonald with many calling for Mayor Emanuel to resign.  Ramsey was recruited to assist leadership with policies ranging from community policing, interacting with the mentally ill and training, the Tribune reported.

Ramsey was famously tapped by President Obama to head the president's task force on 21st Century Policing in the wake of the Ferguson case.

Since stepping down from the Phialdelphia Police Department earlier this month, Ramsey, who is remaining in the Philadelphia area, has been hired as a consultant to the police department of Wilmington, Delaware, and as an academic fellow at Drexel University.