Deposit money banks are financial institutions licensed by the Central Bank of Sierra Leone to mobilize deposit from surplus unit and channel the funds through loans to the deficit unit and perform other financial services, such as accepting deposits, giving business loans and auto loans, mortgage lending and basic investment products like savings accounts and certificates of deposit. This study examined the Forensic accounting techniques and fraud prevention in Sierra Leonean money deposit banks. Survey design was utilized in this study with relation to Forensic accounting techniques and fraud prevention in Sierra Leonean money deposit banks. The regression estimates show the effect of forensic accounting techniques on corporate governance, internal control, and whistle blowing which indicates that the forensic accounting techniques have a positive significant effect on corporate governance, forensic accounting techniques have a positive significant effect on internal control also forensic accounting techniques have a positive significant effect on whistle blowing respectively of the surveyed Sierra Leonean deposit money banks.