Think about it - after over a year of investigation the strongest thing you can say about Alice Huang is/was a 'suspected' spy - which is a phrase you can use about anything - I suspect you - therefore you are 'suspected'.
Wake me up when that changes to actual spying.
Also turns out this wasn't the only affair the CEO had and it's not suggested the other woman was a spy.
Sometimes that means that they know but can’t reveal the source of that knowledge without losing a big edge. See the Rosenbergs and Verona decryptions for example.