Phenomanan said:
Woah she's nuts. Why doesn't SHE get sent to death for being a disobedient claymore? Maybe she's just too valuable.
Just like she said, if there are no witness, there is no way the organization can know. In the case of Teresa, there must have been one, even if it is one of those that can sense auras from afar. At least that's how I understand it.