People v. Rhinehart 

Defendant was convicted, after bench trial, of defacing ID marks of a firearm and aggravated unlawful use of a weapon. Unidentified citizen flagged down a police officer and told him that a man wearing white shirt and yellow pants had a gun, and told of man's location. Tip was not sufficiently reliable to provide office with reasonable suspicion that Defendant was engaged in criminal activity to justify Terry stop. Thus, court should have granted motion to suppress evidence of gun found on Defendant in pat-down search, and his statements as to gun. (STEELE and NEVILLE, concurring.)