The Commercial Crimes Court in the South African business capital Johannesburg has convicted accountant Hildegard Steenkamp of embezzling R537m ($27.9m) from her employer, Medtronic, to fund a lavish lifestyle that included big losses at casinos.

CrimeInSA took to Twitter on Monday to share news of the staggering criminal enterprise that started six months after Steenkamp joined Medtronic and lasted for 13 years:

Steenkamp, who is from the city of Boksburg, joined Medtronic in 2004 as a junior accountant. According to a testimony by forensic investigator Graham Dawes at the ongoing trial, the fraudster used most of the money she stole for overseas travel, jewelry, fashion items, and, most significantly, gambling.

some of her thefts topped R20m ($1m) in a single month

Monday’s testimony revealed Steenkamp lost R5m ($260,507) gambling in one night, while some of her thefts topped R20m ($1m) in a single month. Steenkamp pleaded guilty in May to 336 charges and, while the Joburg court has already convicted her of embezzlement, her sentencing is to come on Tuesday.