I said the same but Witness B's testimony still doesn't rest easily with me, and I can't really see why they would lie about it. I do seem to be going around circles now though so I'll just leave it with saying that these cameras have my full support.
The evidence of Witness C is also interesting. Witness C was a journalist who interviewed Witness B. Notes written by Witness C claimed that Witness B had initially thought that Duggan was carrying a gun but later changed his mind. Witness B denies changing his mind and Witness C could not be 100% certain as to the accuracy of his/her notes - but this seems a pretty fundamental point.