(CNN)Think "international manhunt" and the image that likely springs to mind is that of a hardened criminal like a murderer, bank robber or billion-dollar fraudster -- not the middle-aged boss of a high school tuition center.
But that's who's at the center of a Red Notice issued this week by the International Criminal Police Organization, or Interpol, which facilitates police cooperation between 194 countries.
Poh Yuan Nie, 57, is thought to have fled Singapore after masterminding an elaborate cheating scam during the Southeast Asian country's annual GCE O Level examinations, which students take during their final year of high school.
Poh failed to surrender to police after a court sentenced her to four years in prison for running the scam, in which she and three of her tutors fed answers to students using a system of bodycams, earphones and bluetooth devices.
Private tuition centers are big business in the wealthy city-state where the pressure for students to perform well can be overwhelming and it is not unusual for monthly fees at established private tuition centers to cost up to 2,000 Singapore dollars ($1,500).
According to early court documents, Poh, 57, and her three accomplices -- her niece Fiona Poh Min, ex-girlfriend Tan Jia Yan and a Chinese national named Feng Riwen -- were each paid 8,000 Singapore dollars ($6,100) by a man from China to help six students aged between 17 and 20 -- also from China -- pass the GCE exams in 2016 so they could enter local colleges.
The payment would have been fully refunded if the students did not pass the exams.
Under Poh's instructions, the six students wore skin-colored earphones and taped mobile phones and bluetooth devices to their bodies so that they could be fed answers by Tan who posed as a private student sitting the same test papers.
With the help of a hidden camera phone taped to her chest, Tan livestreamed the questions to Poh and the two other tutors back at the tuition center, who then worked out the answers and fed them to the students.