It wouldn't be unlike this show to trick the audience into thinking someone is a rat when they're not. Det. Makazian never says there's just one rat. At least I don't recall. Plus, he might not even know. We eventually find out Pussy is one, but we never know for certain that Jimmy is. I've never really thought of it, but this show relies on mystery as much as drama and comedy. They love to get the audience thinking in one direction, only to surprise them with something from the other.

"...the successful annihilation of organized crime's subculture in America would rock the 'legitimate' world's foundation, which would ultimately force fundamental social changes and redistributions of wealth and power in this country. Meyer Lansky's dream was to bond the two worlds together so that one could not survive without the other." - Dan E. Moldea