Answer: Harry Markopolos is the investigator who discovered the Madoff affair.
Step-by-step explanation:
Marcopolos was a key figure in uncovering the Madoff affair. Marcopolos revealed many suspicious details related to Bernie Madoff’s wealth management between 1999 and 2008. Markopolos has repeatedly informed the authorized institutions with certain irregularities, but the accusations were rejected and assessed as unfounded each time. However, in 2008, Madoff was arrested after irrefutable evidence and received a sentence of 150 years in prison.