His mate delivered the paper today just as I was stepping out to get my lunch. I asked him where the theiving little shite was, and he said "I'm filling in for him".
I when back in to put the paper on the side and pick my sunnies up. As I got round the corner, I saw the lad, and what looked like the light-fingered toerag. I caught up with them by the newsagent's at the top of the road, so now I know where they deliver from. 
I shouted, "Where's my money then, Fingers Malone", and stood right in this kid's face - he denied being the lad from yesterday, but more or less gave himself away by blurting out "I can get you your money back, do you want your money? Do you want the money?", obviously shitting himself.
I let them both know I'd called the newspaper distributors, who want to get the police involved, and fully intend seeing it through. I asked them how they'd feel if I had stolen some of their property from their own doorstep, which prompted "pissed off" as a reply. I just shouted "Damned right I'm fucking pissed off" in this kid's face. One of them gave me a name of the kid that supposedly done it.
I let them go, told them they were lucky they didn't have broken hands (I'd never lay a finger on a juvenile unless physically provoked, and only then to restrain). And now we wait until Monday, when the manager of the distributors call me back.