scaramella has been a hard man to pin down. wanted to meet us in naples, then new york, then london. he finally agreed on rome, and we're about to find out why he's been so skittish. [ speaking italian ] >> how to describe scaramella? he's a lawyer, an academic, a security analyst, and also someone litvinenko never completely trusted. scaramella, you'll remember, is the contact litvinenko met at the sushi bar on the day he was poisoned. litvinenko thought you poisoned him? >> yes. >> you didn't poison him? >> absolutely not. >> from his perspective, it does make sense. >> uh-huh. no, sure, everything is very strange. >> scaramella had been working for the italian government and sometimes used litvinenko as a source for investigations into the russian mob and spy rings. so he was giving you names of russian mafia members. >> yes, names, dates. >> who were connected to the intelligence service? >> exactly. >> something that was sure to upset both the mobsters and the fsb. scaramella told us that in october 2006, the month before