Auditors use data extraction programs such as IDEA and ACL for data mining, and data investigation for evidentiary purposes. Incorrectly using data extraction tools could actually contaminate digital data. For courtroom use, forensic accountants often use imaging software such as EnCase, SafeBack, Helix, and Ontrack's Easy Recovery software, to collect digital data without affecting data integrity. Compare and contrast these four imaging software programs and select the one you would use for a digital forensic fraud case. Explain the reasoning for your selection.