The case hinged on expert witness evidence, today that expert witness evidence has been publicly called out by the man who wrote the paper the expert relied on in court.
Perhaps an analogy would help. If I was charged by the CPS with murdering someone, and the prosecution case was built on an experts evidence that the murder victim had died by drowning and I was convicted, and it then turned out that the person hadn't drowned, all the other evidence in the case wouldn't really matter an awful lot.