In the Omagh bombing case... LCN DNA was admitted untilnit was challenged... Once challenged it was ruled inadmissible and the trial stopped
If this were true it would be quite correct to cancel the trial, but unfortunately it's not quite the truth.
The evidence wasn’t deemed to be inadmissible but was declared of an unsatisfactory quality, There were 3 strands to the prosecution's case
1. TPUs (time power units) were all linked to the accused by the prosecution.
2. Fibres on the TPUs were linked to the defendant.
3. LCN DNA linked to the defendant.
The judge ruled he wasn’t satisfied with all 3 strands of evidence and was particularly scathing of the LCN DNA evidence. He cleared the defendant of all charges, its a totally different legal declaration than declaring evidence inadmissible mid trial.
From the Irish Times Dec 21 2007
“In the case against Mr Hoey, said Mr Justice Weir, "the evidence against the accused in this case did not reach that immutable standard. Accordingly I find Mr Hoey not guilty of each of the remaining counts on the indictment".”
As a side note after the judges scathing declaration concerning the DNA evidence incidentally carried out by the FSS(yes the same ones who carried out the test on the Madeleine Mccann DNA) all trials with LCN evidence was suspended but resumed in 2008.