MR NEL
Thank you sir.  Mr Cuba, according to this explosives expert he says that
"The person who fiddled or detonated this device would have had to remove the dust cover that covers the detonator in the bus because that cover was still found in the bag on the scene."
Now your evidence is that you know nothing about this limpet in the bag and you also did not see Mr, if it was him, the deceased Mr Namba, fiddling with the device?