DEA,SS,CIA -Year of 1st use of poly?

[poly_question]

Can anyone fill in the first year that the poly was used for the following Special Agent positions:

DEA:
USSS:
CIA:

I know the following were the first years that the poly was used by the FBI and ATF for Special Agent positions:

FBI- 1994
ATF- 2001

Thanks.

[George W. Maschke]

If I'm not mistaken, CIA officers are not "special agents" in the sense that federal law enforcement officers are. While I'm not sure when polygraph screening became a general requirement for CIA employees, the CIA polygraph program was set up in 1948 by Cleve Backster (who didn't stay long).