Searching for inspiration

My Writing Group are holding a short story competition and I feel duty bound to enter it. This is probably because the judging for the Bridport Prize is going on at the moment with results in Oct/Nov, so I am fully expecting to feel thoroughly rejected and unloved at that time. Much better to have another competition entry already written and submitted in order to ease the pain.

So I sat down yesterday evening to write. And the not entirely unexpected happened. I closed the window a few hours later with absolutely nothing written. OK so Carol Vorderman was busy in the background finding out about her ancestors, but since I'm not a huge fan of either 'Who do you think you are?' as a concept or of the lady concerned that wasn't too much of a distraction.

While on the subject, whoever decided she was the 'thinking man's crumpet'? I count myself as qualifying on both counts - thinking and man - but she doesn't get into the crumpet category for me. Isn't that very condescending, the thought that just because a man does his thinking between his ears instead of between his legs, that he will automatically find a certain woman attractive? Surely there would (rightly) be an outcry if Sienna Miller was the 'posh actor's crumpet', Jordan the 'poor, brainless man's crumpet', J-Lo the 'black man's crumpet' or Tanni Grey-Thomson the 'disabled bloke's crumpet'. Why is it not the same for thinking men?
And personally, I think Tanni Grey-Thomson is cute...

Back to the subject. I think inspiration has struck but thought I'd run the idea past you lot to see what you think before I start actually writing it.

The concept, not entirely original, is a backwards story.

• It starts (at the end) with a man celebrating the laws on the DNA database being changed and him finally getting his sample destroyed and his details removed from the database
• He campaigns to have the law changed
• He struggles to have his DNA sample destroyed before realising it's hopeless unless the law changes
• A different guy is convicted of the rape/murder and jailed for life
• Our 'hero' gives his DNA sample as part of a voluntary town-wide blanket testing for the man who raped and murdered a 16-year-old girl
• It then ends (at the start) with him raping and murdering the girl

My idea is that the story is essentially a character study...to build up a character that the reader can identify with and feel compassion for in his predicament before destroying all of the suppositions one has made about him - ie that he is innocent. Technically I have to work out how he gets away with it...but that's a minor detail!

I also thought about adding an epilogue which skips back (forward) to the evening of the celebration where the story started (ends) and him watching another girl in exactly the same way I would describe him doing at the beginning of the rape/murder scene.

So what do you think?