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Historic DNA Conviction of Identical Twin in Cold Case

9/3/2025

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Summary

Story summary

Russell Marubbio, 54, was convicted on August 21 for a 1987 sexual assault in Virginia, marking a historic DNA-based conviction of an identical twin.
Parabon NanoLabs used advanced sequencing to identify genetic differences between Marubbio and his twin.
The case underscores the increasing role of forensic genetic genealogy in resolving cold cases.
Experts expect more cases to emerge as technology and law enforcement training improve.

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Story summary

Russell Marubbio, 54, was convicted on August 21 for a 1987 sexual assault in Virginia, marking a historic DNA-based conviction of an identical twin.
Parabon NanoLabs used advanced sequencing to identify genetic differences between Marubbio and his twin.
The case underscores the increasing role of forensic genetic genealogy in resolving cold cases.
Experts expect more cases to emerge as technology and law enforcement training improve.