"As a standard procedure when there are allegations of information being leaked, an internal investigation has been opened and we are also looking at our vulnerabilities".
Smollett's attorney Mark Geragos says police have been insidiously working to ruin Smollett's case and his image.
In the aftermath of the alleged Jussie Smollett attack, both fans and colleagues of the actor have had to choose sides in the polarizing fallout.
"I would like to point out that a lot of the information out there was inaccurate and there were numerous agencies involved in this investigation", a spokesperson for the force said in a statement.
The Chicago Police Department is investigating its own officers over reports that officers leaked information about the Jussie Smollett case. The unidentified nurse "was fired last week and believes many other nurses and staffers were fired for the same reason".More news: Lindsey Graham: Senate Will Investigate FISA Abuse, Surveillance of Trump Campaign
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Additionally, on Wednesday, CBS Chicago reported that dozens of hospital workers at Northwestern Memorial Hospital - where the Empire star was treated after allegedly getting attacked in a hate crime - may have been fired. She says she never accessed the actor's chart but simply scrolled past it when looking for another patient's name.
Police Superintendent Eddie Johnson held a press conference on February 21 calling Smollett's conduct "despicable".
Smollett, 36, a black, openly gay actor on the hip-hop TV drama "Empire", was charged with lying to police last month after he said he was attacked in January by two masked men who shouted racist and homophobic slurs.
Chicago Police Superintendent Eddie Johnson may have also gone too far when he said Jussie paid the brothers $3,500 to stage the attack. Queen Latifah defended Smollett after he was arrested for allegedly staging his own attack.
Smollett is next due in court on 14 March to face the disorderly conduct felony charge.