United States v. Hock Chee Koo
770 F. Supp. 2d 1115
D. Or.2011Background
- Defendants Khoo and Soutavong are charged with conspiracy under 18 U.S.C. § 371 and multiple substantive counts (wire fraud, theft of trade secrets, and computer fraud) related to alleged misconduct against The Hoffman Group.
- Wu is charged similarly but has not appeared in the case.
- Two motions remain: to exclude images of Wu's laptop/external drive and to compel use immunity for Brian Emerson; a third defendant faces civil litigation only.
- An evidentiary hearing was held on the exclusion motion, with witnesses from FBI and police and consideration of chain-of-custody and authenticity.
- Hoffman Group filed civil suit against Wu, Soutavong, Khoo, and Emerson; the government later indicted the same defendants in criminal proceedings based on those events.
- The court grants in part and denies in part the exclusion motion and denies the use-immunity motion.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Are the Wu laptop images admissible and authentic? | Government contends images are authentic duplicates of what was seized. | Khoo/Soutavong argue images may not reflect original content due to tampering and data capture methods. | The Acronis Backup Image is admissible as a duplicate; the Laptop Image is not shown to be in substantially the same condition, so not admissible for contents. |
| Can the AcronIS image be used as best evidence for contents? | Acronis image is admissible as best evidence of data captured, not a full replica of the original; weight goes to authenticity and context. | ||
| Is the Laptop Image admissible to prove contents of Wu's laptop? | No; the Laptop Image is not authenticated as substantially the same as the original and is excluded for contents. | ||
| Should Emerson receive use immunity or other relief? | The court denies use-immunity extension; no selective immunity to government witnesses found; trial will permit cross-examination and subpoenas. |
Key Cases Cited
- United States v. Tank, 200 F.3d 627 (9th Cir. 2000) (touches on authentication burden for evidence)
- United States v. Harrington, 923 F.2d 1371 (9th Cir. 1991) (chain of custody considerations)
- Gallego v. United States, 276 F.2d 914 (5th Cir. 1960) (substantial similarity standard for admissibility)
- United States v. Bonallo, 858 F.2d 1427 (9th Cir. 1988) (possibility of data alteration affects weight, not admissibility)
- United States v. Safavian, 435 F. Supp. 2d 36 (D.D.C. 2006) (data integrity considerations in digital evidence)
- United States v. Godoy, 528 F.2d 281 (9th Cir. 1975) (necessity of substantial similarity for physical evidence)
- United States v. Dickerson, 873 F.2d 1181 (9th Cir. 1989) (substantially the same condition requirement for tangible evidence)
- Soulard, 730 F.2d 1292 (9th Cir. 1984) (completeness and weight issues in authenticity)
- Amoco Prod. Co. v. United States, 619 F.2d 1383 (10th Cir. 1980) (best evidence concept relative to duplicates)
- United States v. Catabran, 836 F.2d 453 (9th Cir. 1988) (creation-date discrepancies affect weight, not admissibility)