The sadness is that it can so easily be a crazed individual and without recourse to prostitutes he may just pick on any woman - it happened with the Yorkshire Ripper.

Applying logic to the thinking of these kind of people is never going to give quick answers - they don't run to the norms we run to.

As for the girls - my heart may go out to the families but it has to be remembered the women did put themselves at risk. And usually to feed a drug habit. There are other avenues and difficult though they may be for them - how difficult is the violence of death?