That, along with information from parolees, led them to the two men.

CNN: STORY HIGHLIGHTS

"Isolation can be a breeding ground for depression and deviancy, " said Irwin, a psychotherapist who works with court-mandated parolees and probationers in California.

CNN: SHARE THIS

They are no keener on a plan to reduce the state prison population by 20, 000 and the number of parolees by a similar number.

ECONOMIST: State fiscal crises may deepen America's downturn

And about two in three parolees soon ended up back in jail, usually for technical hiccups, such as a missed meeting with a state parole officer.

ECONOMIST: California��s overcrowded prisons

The directive is a follow-up to a 1996 law that denies federal prison funds to states that do not give drug tests to prisoners and parolees.

CNN: Budget Will Provide $200 Million For Initiative

Under Clinton's directive, to be signed at an Oval Office event Monday afternoon, states will have to submit annual reports on the levels of drug use it finds among inmates and parolees.

CNN: Budget Will Provide $200 Million For Initiative