The investigation of Terminus involved a great deal of energy, mostly from the Chicago Task Force, but it was to be the least-known and least-publicized of the Crackdown operations. Terminus, who lived in Maryland, was a UNIX programmer and consultant, fairly well-known (under his given name) in the UNIX community, as an acknowledged expert on AT&T minicomputers. Terminus idolized AT&T, especially Bellcore, and longed for public recognition as a UNIX expert; his highest ambition was to work for Bell Labs.

But Terminus had odd friends and a spotted history. Terminus had once been the subject of an admiring interview in Phrack (Volume II, Issue 14, Phile 2—dated May 1987). In this article, Phrack co-editor Taran King described "Terminus" as an electronics engineer, 5'9", brown-haired, born in 1959—at 28 years old, quite mature for a hacker.

Terminus had once been sysop of a phreak/hack underground board called "MetroNet," which ran on an Apple II. Later he'd replaced "MetroNet" with an underground board called "MegaNet," specializing in IBMs. In his younger days, Terminus had written one of the very first and most elegant code-scanning programs for the IBM-PC. This program had been widely distributed in the underground. Uncounted legions of PC-owning phreaks and hackers had used Terminus's scanner program to rip-off telco codes. This feat had not escaped the attention of telco security; it hardly could, since Terminus's earlier handle, "Terminal Technician," was proudly written right on the program.

When he became a full-time computer professional (specializing in telecommunications programming), he adopted the handle Terminus, meant to indicate that he had "reached the final point of being a proficient hacker." He'd moved up to the UNIX-based "Netsys" board on an AT&T computer, with four phone lines and an impressive 240 megs of storage. "Netsys" carried complete issues of Phrack, and Terminus was quite friendly with its publishers, Taran King and Knight Lightning.

In the early 1980s, Terminus had been a regular on Plovernet, Pirate-80, Sherwood Forest and Shadowland, all well-known pirate boards, all heavily frequented by the Legion of Doom. As it happened, Terminus was never officially "in LoD," because he'd never been given the official LoD high-sign and back-slap by Legion maven Lex Luthor. Terminus had never physically met anyone from LoD. But that scarcely mattered much—the Atlanta Three themselves had never been officially vetted by Lex, either.

As far as law enforcement was concerned, the issues were clear. Terminus was a full-time, adult computer professional with particular skills at AT&T software and hardware—but Terminus reeked of the Legion of Doom and the underground.

On February 1, 1990—half a month after the Martin Luther King Day Crash—USSS agents Tim Foley from Chicago, and Jack Lewis from the Baltimore office, accompanied by AT&T security officer Jerry Dalton, travelled to Middle Town, Maryland. There they grilled Terminus in his home (to the stark terror of his wife and small children), and, in their customary fashion, hauled his computers out the door.

The Netsys machine proved to contain a plethora of arcane UNIX software—proprietary source code formally owned by AT&T. Software such as: UNIX System Five Release 3.2; UNIX SV Release 3.1; UUCP communications software; KORN SHELL; RFS; IWB; WWB; DWB; the C++ programming language; PMON; TOOL CHEST; QUEST; DACT, and S FIND.

In the long-established piratical tradition of the underground, Terminus had been trading this illicitly-copied software with a small circle of fellow UNIX programmers. Very unwisely, he had stored seven years of his electronic mail on his Netsys machine, which documented all the friendly arrangements he had made with his various colleagues.

Terminus had not crashed the AT&T phone system on January 15. He was, however, blithely running a not-for-profit AT&T software-piracy ring. This was not an activity AT&T found amusing. AT&T security officer Jerry Dalton valued this "stolen" property at over three hundred thousand dollars.