Yes, and it's not clear what new evidence could now emerge.
What the two cases have in common is that to date, nothing puts either suspect at the crime scene at any time. In fact, in Cannan's case, we don't even know where and when the crime occurred, nor do we have a body. Without that information, the case against each is entirely inferential, and based on the reasoning that they're the likeliest culprit.
In Cannan's case, the circumstantial and verifiable facts in support of his guilt point to several hundred other people as well. The further evidence that narrows it down to
just him is
not verifiable, having come from a career criminal years after the fact, for reasons we don't know.
In BG's case, the circumstantial evidence does not point to anybody else besides him. Per
Nick Ross' blog:
- He had been seen in the road four hours before Jill’s murder.
- He had been identified as having been by two separate witnesses near the killing in an agitated state soon after the murder.
- The witnesses, including a mental health worker, were so concerned about him that in the days after Jill’s murder they had rung the incident room repeatedly.
- He had returned to both witnesses the following day seeking to persuade them he had been there at different times and in different clothes.
- He had a history of violence against women, including formal warnings, convictions for sexual assault and a prison term for attempted rape.
- When under surveillance he routinely stalked women.
- He had once been found in the grounds of Kensington Palace with a balaclava, a knife and a rope – but was never charged because he was thought to have mental problems.
- Itsuko Toide, briefly his wife in a marriage of convenience, was so frightened of him that she reported his violence to the police and fled back to Japan. She later told Nick Ross she had no doubt he was Jill’s killer.
- Despite denying he had an interest in Jill Dando or the BBC, undeveloped film recovered from his apartment showed he took photos of women from his TV, and he kept copies of the BBC’s in-house magazine.
- Although he denied he had ever owned or held a gun, a reel of undeveloped film was processed and revealed him posing with a pistol.
- The pistol he was holding was of the same type that killed Jill.
This still falls short of putting him at the crime scene, and indeed even the speck of gun residue doesn't do so either; it just suggests he had a fired gun in his pocket at some point.