The actual on-the-ground investigation was done by an at least nominally-independent UN team (UNSCOM).
Scott Ritter specifically rejected WMD claims: https://en.m.wikipedia.org/wiki/Scott_Ritter
The investigation lead by Hans Blix found some violations but AFAIR no indications of a significant WMD capability. The Wikipedia article has more information (I've skimmed it): https://en.m.wikipedia.org/wiki/Iraq_and_weapons_of_mass_des...
I don't think this maps well to the Humint/Sigint division. Inspectors relied somewhat on both, though non-covert on-site visits played a large role.
(Sigint and Humint are more typically covert.)
The actual on-the-ground investigation was done by an at least nominally-independent UN team (UNSCOM).
Scott Ritter specifically rejected WMD claims: https://en.m.wikipedia.org/wiki/Scott_Ritter
The investigation lead by Hans Blix found some violations but AFAIR no indications of a significant WMD capability. The Wikipedia article has more information (I've skimmed it): https://en.m.wikipedia.org/wiki/Iraq_and_weapons_of_mass_des...
I don't think this maps well to the Humint/Sigint division. Inspectors relied somewhat on both, though non-covert on-site visits played a large role.
(Sigint and Humint are more typically covert.)