Any thoughts on why Stan didn't tell the defector that they had in fact personally dealt with another defector who'd gotten killed on U.S. soil? Is that confidential, or was he trying not to scare her?

I assumed he wasn't allowed to talk about other similar situations, for security reasons of the "it's bad enough if one defector dies/goes back on arrangements, but worse if they then also have lots of insider info on other missions too" type.