A spokesman for Chief Judge Timothy Evans' office says Cook County Circuit Judge Joseph Claps has been reassigned to "nonjudicial duties," pending a review.
The Executive Committee of the Circuit Court of Cook County made the decision, according to a statement.
A Cook County sheriff's deputy who witnessed the incident notified superiors, who reviewed the video, the station reports.
Judges can be temporarily reassigned to restricted or other non-judicial duties "whenever there are charges of implications of improper conduct, depending on the severity and nature," the statement from the chief judge's office says.
In Cook County Circuit Court, administrative duties can include performing legal research, conducting marriage ceremonies and reviewing petitions for reduced court-filing fees.
EXCLUSIVE: Cook County Judge Joseph Claps placed on "non-judicial duty" and charged with misdemeanor after video appears to show him dropping a gun, then picking it up in courthouse lobby. More on @WGNNews at 4pm. @WGNInvestigates pic.twitter.com/aqnVBAAE6Y— Ben Bradley (@BenBradleyTV) July 10, 2018