Cuchillo was extremely suspicious of Yves Adele Harlow (posing as Vera Lehdow) sudden appearance in the life of his employer and he was convinced multiple times that she was more than she seemed but she managed to explain her actions well enough to convince Cuchillo's boss that she was not betraying them. Her final act being to pretend to murder Langly with Cuchillo's own knife. When Cuchillo went to check the body he realized Yves was indeed setting them up to intercept the composite (The Lone Gunmen: Tango de los Pistoleros)