Mods please delete if I'm straying off topic
Double Jeopardy law may be overturned if enough people wanted it. I posted earlier about this and that its been abolished in the UK - here's a part of the post - it makes so much sense when you think of the advances in dna/technology evidence.
If enough people want this to happen anything is possible
Following the murder of Stephen Lawrence, the Macpherson Report suggested that double jeopardy should be abrogated where "fresh and viable" new evidence came to light, and the Law Commission recommended in 2001 that it should be possible to subject an acquitted murder suspect to a second trial. The Parliament of the United Kingdom implemented these recommendations by passing the Criminal Justice Act 2003, introduced by then Home Secretary David Blunkett. The double jeopardy provisions of the Act came into force in April 2005, but are applicable to crimes committed before then.
Under the 2003 Act, retrials are now allowed if there is "new" and "compelling" evidence for certain serious crimes, including murder, manslaughter, kidnapping, rape, armed robbery, and serious drug crimes. All such retrials must be approved by the Director of Public Prosecutions, and the Court of Appeal must agree to quash the original acquittal.
On 11 September 2006, William Dunlop became the first person to be convicted of murder after previously being acquitted. Twice he was tried for the murder of Julie Hogg in Billingham in 1989, but two juries failed to reach a verdict and he was formally acquitted in 1991. Some years later, he confessed to the crime, and was convicted of perjury. The case was re-investigated in early 2005, when the new law came into effect, and his case was referred to the Court of Appeal in November 2005 for permission for a new trial, which was granted. Dunlop pleaded guilty to murdering Julie Hogg and raping her dead body repeatedly, and was sentenced to life imprisonment, with a recommendation he serve no less than 17 years.
On 13 December 2010, Mark Weston became the first person to be convicted of murder after previously being found not guilty of the same offence, that of the murder of Vikki Thompson at Ascott-under-Wychwood on 12 August 1995. Weston's first trial was in 1996, when the jury found him not guilty. Following the discovery of compelling new evidence in 2009 Thompson's blood on Weston's boots Weston was arrested in 2009 and tried for a second time in December 2010, when he was found guilty of Thompson's murder, and sentenced to life imprisonment to serve a minimum of 13 years.