Step (1) First Create A Clone Id If Which You Want To Report. Your Cloned Id Should Have Same Name+Profile Pic+DOB+Cover Pic+Other Details.
Step (2) Now Goto The Profile ThatThat You Want To Report. Now Report >>Report This Profile>>They're Pretending To Be me Or Someone I Know >>Someone I Know >>Submit For Review.
IF YOUR REPORT IS ACCEPTED, HIS/HER WOULD BE CRASHED.