The DNA Mixture Was Too Complex. TrueAllele^® Unmixed the Evidence Data in a Sexual Assault Case.

Case summary

The lab could not interpret the DNA mixture from a lubricant bottle using their interpretation methods because it was too complex. On the same lab DNA data, TrueAllele’s match statistic connecting the lubricant bottle with the girl was 4.88 nonillion. The jury found Calvin Odera guilty on all counts.

What the lab report said

• The lab was unable to interpret the DNA mixture data. The evidence was too complex for their interpretation methods.

Why this mattered for the investigation

• This was a sexual assault case where a key evidence item existed, but the DNA mixture was too complex for the lab to interpret. Without computer interpretation, this evidence would not have been presented at trial.

What was submitted

• The lab’s electronic DNA data from a lubricant bottle recovered from Odera’s bathroom
• Reference data for comparison

What changed after TrueAllele interpretation

• TrueAllele resolved the DNA mixture and calculated a match statistic of 4.88 nonillion, connecting the lubricant bottle with the girl.

Outcome

• Following a trial, the jury found Odera guilty on all counts.

Case Takeaways

If your sexual assault case includes an evidence item the lab says is “too complex to interpret” (or similar language):

1. Request the electronic DNA data files (.fsa or .hid) for the key items and reference profiles, including allelic ladder files.
2. Do not assume “too complex” means “not usable.”
3. Request a Free TrueAllele Screening.
4. If screening results are helpful, request a court-ready case report.

For more information on what to request from the lab, see the Sending Cases for TrueAllele Processing page.

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We don’t retest physical evidence items. We interpret the electronic DNA data a lab already generated.