Was trained. The bio informs that she was released from duty due of her not providing enough good results to be actually used in field (even if my phrasing wasn't the best, and I do apologize for that <.<). A 'failure' to put it in one word. And yeah, It's not like her blood ends up on someone just like that, It's just one of those little facts like what genre of music she would like, or her favorite food really.