u.s. crew paul so no official confirmation yet but this is a source close to the investigation that's being quoted in british media and based on the information that we have so far do we know what led police to the suspects. well according to that source it was c.c.t.v. footage in the u.k. not only here in london where. there are security cameras really everywhere and it's this footage of the security cameras then checked with border traffic so people who traveled in and out of the country this is according to the source or lead to the identification of several suspects but we have to take it with a pinch of salt not the government or the police have said anything official. so there's another couple who were recently poison in the nearby town do police believe that there could be a link between these two cases. well that's always been the working assumption of the investigators and the home secretary's job that that was the main line of inquiry and the assumption was that this couple has found left over a syringe maybe or some sort of capsule that they have been in contact with. but that it