technically this is asking your own personal opinion but i will give an asnwer based on my knowledge of it:
"In my personal opinion, it is an unfair clause. If a criminal were to go to court for a crime and walk free he would never be able to be accused of that crime in the future. Detectives are always making new leads in cases and if they were to find any new eveidence, no matter how incriminating it was they would not be able to arrest him a second time.