The accused committed the fraud between 2012 and 2014 at Singapore's Changi Airport, where she was supposed to process refund claims made by tourists departing from Singapore.
The accused was once spared and sent to Institute of Mental Health for killing his brother-in-law but he was sentenced to life imprisonment for murdering another man in a coffee shop.
Tan Kim Ho from Malaysia allegedly helped former leader Chew Eng Han to flee from Singapore and was arrested with the help of Malaysian Police in Malaysia.
Facebook is embroiled in a widening scandal that a British data firm called Cambridge Analytica had improperly gathered detailed Facebook information on 87 million users.