I ve been face to face with dozens of sick serial killers but pure evil Brit terrified me most

HES come facetoface with some of the most notorious serial killers in the world but one woman left criminologist Christopher BerryDee chilled to the bone. The excommando reckons Joanna Dennehy who killed three men and stabbed two others is the most dangerous person hes ever interviewed. BerryDee, a renowned expert in the psyche of murderers, has met with killers like Roadside Strangler Michael Ross who murdered eight girls and women and John Robinson, known as the Slavemaster, who took the lives of at least three women. Yet he was most disturbed by a meeting with Dehenny, 41, who killed three men including her landlord in a killing spree in March 2013. BerryDee said: Shes the most dangerous person Ive ever, ever, ever come in contact with. Shes not actually a big person and the knife she used isnt that big dagger she was pictured holding but a pocket knife measuring about five inches. To walk up to someone in the street like she did and stab someo