When a device is received for data examination or evidence extraction, which procedure should occur first?

Creating an exact bit-level image of the device or drive is crucial in the forensic process because it allows for a complete, exact copy that captures every bit of data, including deleted files and unallocated space. This initial step ensures that the original evidence remains intact and unaltered during the examination process. By working off the bit-level image, investigators can perform their analysis without risking any changes to the original data, which is essential in maintaining the integrity of the evidence for potential legal proceedings.

The process of imaging the device first not only preserves the evidence but also enables a thorough and meticulous examination afterward. This approach adheres to best practices in digital forensics, which prioritize evidence preservation and the ability to replicate findings. All subsequent analysis, documentation, and lab processing can then be performed on the image rather than the original device, safeguarding the authenticity and reliability of the evidence collected.