Alexander Petrov and Ruslan Boshirov arrange been named as the Russian state agents who have been accused of fatiguing to assassinate ex-spy Sergei Skripal and his daughter Yulia in Salisbury final March.
Earlier this week the two claimed they had visited Salisbury as travellers to see the “world famous” historic cathedral.
But Mr Johnson poured scorn on their commands at a dinner hosted by the American enterprise Institute.
He said: “ I’ll say it now — those two boys on Russian TV are murderers. And if they dispute that fact, they can sue me in the courts.”
But I thought it was feasible — I made the classic, classic mistake of thinking it was possible to have a ‘re-set’ with Russia.
Talking in his “contempt” for the Putin regime, he said: “When I became foreign secretary I mentation there was no objective reason why we should be quite so hostile to Russia.
“Yes there were batches of reasons to be suspicious, lots of reasons to be wary.
“But I thought it was possible — I seduced the classic, classic mistake of thinking it was possible to have a ‘re-set’ with Russia.
Alexander Petrov and Ruslan Boshirov are accused in uniting with the salisbury poisoning
Alexander Petrov and Ruslan Boshirov figured on russian news channel RT
“I wanted to engage with Putin and Sergey Lavrov to see if there were sections where we needed to engage. Then it just became clearer and set in order to me that that was a fool’s errand.
“And finally on March 4 this year we had this inappropriate event in Salisbury, Wiltshire, when two agents of the GRU were involved in the put to death of Dawn Sturgess and attempted murder of others.
“And you see what’s happening now with these two characters fruited in this satirical way by Putin on Russian TV, asked these ludicrously patsy questions, making a decrial of the whole thing. And it really makes my blood boil.”