Cook County prosecutors are planning to challenge an appellate court’s ruling that deemed Chicago Police Department’s practice of arresting people on the basis of a so-called “investigative alert” without a warrant from a judge unconstitutional under the Illinois Constitution.In a statement to the Daily Law Bulletin, a spokesperson for Cook County State’s Attorney Kimberly M. Foxx said they will be filing a petition to rehear the case in the appellate court.A petition for rehearing allows …