The phrase "to suspect any wrongdoing" means to have a feeling or belief that someone has done something wrong or is involved in some kind of improper activity. Full definition
Or, the general counsel doesn't even know my name, will they believe me if I report suspected wrongdoing? (canadianlawyermag.com)
Erie County employees who suspect wrongdoing by other staff members have been encouraged over the years to call or email the Whistleblower Hotline in the Comptroller's Office. (buffalonews.com)
Internal audits / investigations for businesses who suspect wrongdoing by their employees and agents (scarincihollenbeck.com)