Forensic Audit -- 2

I am looking for an experienced forensic auditor to conduct a thorough audit of specific accounts within our company financials, with a focus of uncovering the extent of fraudulent activity that has already been identified. This project is urgent, with a completion timeframe of within 4 weeks. We have an estimated budget of $1000 to $5000 for the audit. The ideal candidate will be knowledgeable about payroll fraud, credit card fraud, and other ways an employee could steal money from a company. They should have experience in Quickbooks and general accounting. The project outcome should help us identify how much money has been stolen by this employee over the course of the last 2.5 years.