Where a defendant is stopped based on a tip, if the source is effectively anonymous but second- or third-hand it may not be reliable enough to support reasonable suspicion and justify a Terry stop.The 1st District Appellate Court reversed a decision from Cook County Associate Judge Timothy Joseph Joyce.Around 1,200 people were gathered for an annual summer picnic at Brainerd Park in Chicago. A nearby Chicago police sergeant was approached by a security guard who informed him that a man in the park had a gun.The man with …