Former Spy With Agenda Operates a Private C.I.A.

By MARK MAZZETTI

Paul Hosefros/The New York Times

Duane R. Clarridge in 1991. He still runs a private spy agency, after the military ended his contract.

A network of spies run by Duane R. Clarridge shows how private citizens can exploit the chaos of rivalries inside the government to carry out their agenda.