Laws against double jeopardy

• Whos campaign was abolished for serious offences ?

  Ann Ming's and this law prevented a person being tried again for the same offence
• When did the provision came in the criminal justice act system and what is it about ?

  It can in 2003 and this stated that there is new evidence pointing to the guilt of a former defendant
• Why was the provision change in 2003 necessary ?

  Because the law at the time was inadequate to bring justice and also technology was more advanced.