Easy. I plan to offer Gene Hackman & Will Smith fifty pounds sterling each. They will simply check their Satellite CCTV computers, rewind to the point that the bodies appear, follow the car that dumped them back to the house it started from ... and hey presto - you've got your murderer. If it works in silly fecking Hollywood - then it's bound to work in real life. Case closed.
It's that dyslexic Suffolk Santa Keeps leaving prossies under the trees. With apologies if it's been on here before.