think that the. evidence points the evidence or culpability points to the russian state and as it did in the case of alexander litvinenko the trail of polonium led back very clearly to the russian state and in the end. mr putin is in charge and that is that i'm afraid he cannot escape responsibility and cope ability ations will have to be answered they will either need to be backed up with something evidence or they'll need to apologize. international comical weapons experts are in the u.k. to test the samples of the substance that sick in the script those results are expected to take at least two weeks. well let's bring in our correspondent emily sure win in moscow for more emily president putin's first public denial in this poisoning case came shortly after his reelection on sunday was the timing