United States v. Cameron

The court’s reasoning

The court took the government at its word that the detective would not be asked whether an image was child pornography, what the defendant knew, or what he intended when he saved files, and said it would hold the government to those representations at trial. On that basis the proffered testimony — including what path information is and what could be determined forensically from it — was relevant testimony that would assist the trier of fact under Rule 702 and would not offend Rule 704. Because the case was tried jury-waived, the risk of unfair prejudice was reduced, and the court preferred to rule on question-specific objections in an evidentiary context.

From the opinion

“Detective Bradeen may testify as a computer forensic expert in the area of child pornography to those matters set forth in the Government's Notice of Intent.”

Grounds argued

This ruling turned on 3 of the eight arguments that recur across the docket. Each is defined the same way on every entry, so the same ground can be followed across rulings that reached opposite results.

Scope creep

Whether the examiner stayed inside the technical question and out of intent, credibility, and legal conclusions. It is the most avoidable ground on this list and one of the most common.

Fit to the issue

Whether the opinion helps decide a fact actually in issue. Testimony can be entirely reliable and still be excluded because it answers a question the case does not ask.

Qualifications

Whether this witness — by training, certification, or documented casework — is competent to give this opinion. Courts routinely admit examiners qualified by experience alone, and routinely narrow them when the opinion strays past the experience they described.

Practice note

Terms used on this page

Every term below is defined in the forensic glossary — what it is, why a case turns on it, and what happens in the matter when it is mishandled.

• FRE 702

Rulings on the same grounds

One ruling is not a rule. These are the other entries in the docket argued on the same grounds, most-cited first — including the ones that came out the other way, which are the ones worth reading before relying on this entry for anything.

• The Daubert Docket

  All 55 rulings, filterable by ground, outcome and court, with the distribution across the three outcomes reported up front.

• Daubert and digital evidence

  The argument this docket is the evidence for: why an opinion stated one level too strongly is an admissibility problem under Rule 702(d).

• Daubert Exposure Check

  Twelve questions about an expert's methodology, mapped to the failure modes these rulings keep finding, with the remediation for each gap.

• Daubert or Frye?

  Which reliability test your forum applies — settle that before relying on a ruling from another jurisdiction.

← BACK TO THE DAUBERT DOCKET

Attorney advertising / expert services. Each entry summarises a decision as it appeared in the opinion linked from that entry, on the day the entry was written. Decisions are reversed, vacated, superseded, and distinguished, and the text of Federal Rule of Evidence 702 was itself amended effective 1 December 2023 — check the current status and subsequent history of any ruling before relying on it. Nothing here is legal advice, none of it is a prediction about how any court will rule, and it is not a substitute for the rules, standing orders and case law of your own forum.