Harley Filben

Harley Filben is a street informant that JC Denton encounters periodically in Deus Ex, before JC goes to Paris. The first time JC meets him (on the North dock of Liberty Island), Filben is an undercover contact for UNATCO, who passes information to him regarding the NSF activity in the Statue of Liberty (if he is given the password "Iron and Copper"), as well as the key to enter the front doorway to the Statue complex. There is, however, some evidence that Filben is sympathetic towards NSF, including his insistence that the commander controlling the Statue, Leo Gold, is left alive.

Background
"Everybody knows Harley, and Harley knows everybody. That's his job: knowing things. He's the man on the streets, the guy on the inside, the one who looks like he just crawled out of a sewer, but who's just as likely to have been in some general's office.

Don't get the wrong idea. Harley isn't someone who lives in a penthouse an goes slumming for info. He's the real thing. He knows the people who live in the tunnels because that's where he spends his time. He hangs with the ex-soldiers who have gray death, and he learns everything they know... and they know a lot. He chats up local hookers, bums smokes off the NSF guards, does odd jobs in the down-and-out bars, and in general, lives real life up to the grimy, crusty hilt. You can trust that his information will be accurate, for the right price."

- description of Harley Filben

Deus Ex
JC Denton meets Filben again in the Battery Park subway station. Here, he agrees to give JC the code to access the Brooklyn Bridge Subway Station (where the NSF hauls Ambrosia and other supplies to their base in LaGuardia Airport), if he is paid.

On the second return in New York, Filben can be found in the Underworld Bar and he'll inform JC about the UNATCO raid. however the two won't make any conversations.

On JC's third visit to Hell's Kitchen, Filben is found in the Underworld Tavern. He reveals to JC that he was affiliated with the NSF all along (confirming the reason for his concern for Gold), and informs JC (with evidence) that the Midnight Sun reporter, Joe Greene, is really a UNATCO informant. In another astonishing twist, Filben reveals himself as a triple-agent; he works for UNATCO, the NSF, and the Illuminati. JC asks him for Stanton Dowd's location (with success).