@NJ It did not benefit just one case.It is always, thankfully, going to be a small number of cases - and there may well be cases in the future.
You persist with this notion that the laws of the land were changed to the detriment of all, simply to accomodate those naughty Lawrences who would not heed the DPP, rather than apportion the blame for the whole sorry mess to the right people- those on the initial police investigation who botched it so badly, either through indifference or sheer ineptitude, that these killers walked free for years, and some are still walking free to this day.
20 years must be a very long time to see justice unanswered walking the streets.I admire the Lawrences for their resolve and persistence. And there should be no statute of limitations on capital crimes - unsolved crimes should remain open, until new evidence is brought to the court- and now, thankfully, we have a system where such new evidence can be used.Thats a good thing.