More than three decades after a violent rape in Woodbridge, Virginia, a revolutionary DNA analysis has led to the conviction of the attacker—finally resolving a case that once baffled investigators due to the involvement of identical twins.
The crime occurred in 1987, when a gas station employee was assaulted and raped at knifepoint. Although DNA evidence was collected at the time, it did not lead to an arrest. When Prince William County detectives reopened the case in 2019, the DNA profile pointed to two potential suspects: identical twin brothers living in Florida, both sharing the same genetic code.
Conventional DNA testing couldn’t determine which twin was responsible. To move forward, prosecutors turned to a cutting-edge forensic method called somatic mutation analysis, which detects tiny genetic changes that naturally accumulate in a person’s DNA over time. These subtle differences allowed scientists to distinguish between the two brothers and conclusively identify Russell Marubbio, now 54, as the perpetrator.
Marubbio was convicted of violent rape and abduction on August 21—marking the first time this advanced DNA technique has resulted in a conviction in a U.S. courtroom, according to the Prince William County Commonwealth’s Attorney’s Office.
Prosecutors compared the breakthrough to earlier forensic milestones like fingerprinting, emphasizing the importance of adapting legal standards as science evolves. While there has been past judicial skepticism—such as in a 2004 Boston case involving another twin—experts now consider this DNA method to be reliable and scientifically sound.
The victim, now 88 years old, testified at the trial and expressed relief that justice was finally served. Marubbio remains in custody and is scheduled to be sentenced on November 7, per WJLA.