Hey guys, look at the profile of this killer. He's in jail but I think it's a good clue to our perp too. The similarities may not strike you at first, because he targeted young Moms with children. But:
He killed his victims savagely, with a knife.
He attacked one pair of victims in their home (Samantha and her daughter, Jazmine Bisset)
The home adjoined an open area. 1993
He attacked one pair of victims in an open park area (Rachel Nickell and her son), 1992.
He had, three years earlier, raped a woman in front of her children then confessed to his mother. His mother had notified LE, but no link was made with a rape and the investigation was discontinued. 1989
His victims bore a remarkable physical similarity.
He made maps of 'places of interest'.
"Robert Knapper is also believed to be the "Green Chain Rapist who carried out at least 70 savage attacks across south-east London over a four-year-period ending in 1994."
There were lots of mistakes made in this case, and undoubtedly a woman and toddler died who should not have done. An innocent man was indicted.
My point is, I think in this case, like the one above, the crimes our perp committed BEFORE Cheryl and Andy's murder, are very important. And they are there somewhere, just waiting to be found. I hope, hope they had a good, cold case officer on Cheryl and Henry's case.
I also think it would be worth the officers in charge of Cheryl and Andy's case consulting with their English counterparts. I am sure they would help.
Here's the link to the English case, anyway:
http://en.wikipedia.org/wiki/Robert_Napper