Digital Evidence Recovery
Recovery of Deleted Files:
- Find and recover deleted files from a hard drive, flash drive, SD card, etc.
- Analysis of unallocated space for deleted files
- Carving to recover deleted media files from drives
We have several tools capable of recovering deleted data from drives, sometimes even if the drive was formatted.
Recovery of Data from a Formatted Drive:
- Even formatting a drive does not typically delete all data from that drive
- We can still often find and recover files from a formatted hard drive, flash drive, SD card, etc.
Several enhancement techniques were used to clarify this surveillance video including zooming, tracking, pausing, annotations (yellow arrow), luminance adjustments, trimming, and cropping. Such enhancements allow the viewer to better see what is happening, or perhaps what the subject is holding.
Video Authentication and Integrity Verification:
- Video authentication is determining if a video is an accurate and fair representation of whatever incident it purports to be or show
- A careful and thorough analysis of the video and its contents (what is seen in the video) can be used to confirm its authenticity and relevance to a case
- Integrity verification is an analysis to determine if a video has been changed or altered since it was originally recorded or exported
- Integrity verification can be done by analyzing a video metadata, by comparing hash values, and by looking for evidence of edits, alterations, or manipulations
Photogrammetry:
- Photogrammetry is used to determine measurements of objects or space within a video or image
- Height analysis of a person can be determined by photogrammetry
- The size and dimensions of objects can be determined
- Distance between objects, such as vehicles, can be determined
- Laser Scans and LiDAR can be used to create a 3-Dimensional model of an area or object which can then be used to measure height, size, speed, distance, and more
- Reverse projection photogrammetry is a forensic process of determining whether an unknown object or person in a video is a size, height, or shape match to a known object or person
Using Laser Scanning technology and LiDAR, a 3-Dimensional model can be made of an area. This model can then be used to measure people, objects, distances, and more. This image is a LiDAR scan from the room where an intruder was captured on surveillance video. By placing elements of the surveillance video into the 3D model, we can determine the height of the unknown subject (the intruder).
Our forensic team is ready.
Have audio, video, or phone evidence that needs recovery, analysis, or clarification? Contact our lab to discuss your case with a forensic expert.