man's double-dealing

Translations
двуличие человека
The investigation revealed the man's double-dealing in business.
Расследование выявило двуличие человека в бизнесе.
Definitions
Man's double-dealing refers to the act of a man being deceitful or dishonest, especially by pretending to act one way while secretly acting in another, often to gain an advantage or betray someone's trust.