[joglynne]

I think I would find this sudden emergence of new suspect more believable if the artist's impression of the man didn't portray him as the archetypal baddie.

I could understand if this new suspect was the type of person who looked so average that he could have been almost invisible but the man in the sketch looks so dodgy anyone seeing him would surely have noticed him and mentioned him to the police/reporters/private investigators at the time.