The company acquired the 5 PC package with Screen Recording. Monitoring the screen live and in recording, capturing keystrokes, screenshots, application and website activity should have given enough information to reveal the fraudster if there was one. Besides, talks in messengers and emails could become a valuable source of information, so the management paid attention to those logs too.
CleverControl was pushed to the office computers silently via Active Directory not to alarm the possible culprit. Generally, we do not recommend setting up monitoring stealthily, although, in cases like this one, it can be justified.
The accountant was fired. The company was going to sue her, using proofs they got with the help of CleverControl among others.