(740 ILCS 147/25)
(a) In an action brought under this Act, venue shall lie in any
county where an act charged in the complaint as part of a course or pattern
of gang-related criminal activity was committed.
(b) It shall not be necessary for all offenses necessary to establishing
a course or pattern of criminal activity to have occurred in any one
county where the State's Attorneys of several counties, or their designees,
each complaining of any offense, elected to join in a complaint. In such
instance, it shall be sufficient that the complaint, taken as a whole,
alleges a course or pattern of gang-related criminal activity, and each
count of any such joint complaint shall be considered as cumulative to
other counts for purposes of alleging or demonstrating such a course or
pattern of activity.
(c) Where a course or pattern of activity is alleged to have been
committed or to have occurred in more than one county, the State's Attorney
of each such county, or their designees, may join their several causes of
action in a single complaint, which may be filed in any such county agreed
to by or among them, but no such joinder shall be had without the consent
of the State's Attorney having jurisdiction over each offense alleged as
part of the course or pattern of activity.
(Source: P.A. 87-932.)