Can an employee force you to use your vacation while been investigated?

Generally, an employer cannot force an employee to use vacation time while under investigation unless there is a specific policy or agreement in place that allows for this. Employers typically have the discretion to determine how to handle an employee's time off during an investigation, but they must comply with employment laws and any applicable contracts. It’s advisable for employees to review their company's policies and consult with HR or legal counsel if they have concerns.