Defense Challenges FBI Cell Location Data in Murder Case
Attorneys question the accuracy of FBI phone analysis used to place a defendant at a 2023 Washington shooting scene.
Updated on Oct. 20, 2026 in Telecommunications
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Defense attorneys in a Washington murder case are challenging the reliability of FBI cell site analysis used to track Terrance Stoney. The prosecution aims to use these cell tower records to place the defendant at the location of a fatal 2023 shooting.
Why it matters
The case highlights concerns over the scientific rigor of FBI digital evidence mapping that lacks outside accreditation. If the methods are deemed unreliable, it could impact how cell tower data is utilized in future criminal prosecutions.
The FBI analyst estimates phone distances using 78-meter bands calculated from T-Mobile records. However, a Florida Tech study found that phones were correctly situated within these mapped bands only 40 percent of the time.
The players
Terrance Stoney
He is a 33-year-old defendant facing charges including second-degree murder and firearm possession.
Donte Tiller
The 43-year-old victim died from a gunshot wound during the incident in March 2023.
DC Superior Court
This is the judicial body presiding over the criminal proceedings and pre-trial motions for this case.
FBI
The federal agency is providing the cell site analysis team currently under scrutiny for its internal certification practices.
The details
Attorneys argue the analyst lacks formal engineering coursework and relies on self-certified testing methods. The dispute centers on whether the FBI's wedge-based mapping technique provides the precision necessary to identify a suspect's location at the intersection of Naylor Road and Southern Avenue, SE.
Timeline
March 17, 2023: Donte Tiller was fatally shot in Washington.
March 2026: Florida Tech conducted a study on T-Mobile network accuracy.
Oct. 16, 2026: A pre-trial hearing was held in DC Superior Court.
Oct. 25, 2026: The pre-trial hearing is scheduled to continue.
The Tech Race
The challenge to the FBI's methods mirrors the broader evolution of the Daubert standard for scientific expert testimony in federal courts. It highlights the growing tension between proprietary law enforcement digital forensics and academic standards for peer-reviewed technical evidence.
This case may influence how mobile service data is processed and presented in future legal proceedings involving everyday smartphone users. The outcome will determine whether FBI-specific mapping techniques continue to serve as acceptable evidence in criminal courtrooms.
The takeaway
Legal scrutiny of digital forensic tools is increasing as defense teams push for higher standards of reliability in criminal court. Readers should be aware that smartphone location records are subject to complex technical interpretations that may not always reflect precise physical location.
What happens next
The pre-trial hearing is scheduled to resume on Oct. 25, 2026, where the court will likely hear further arguments regarding the admissibility of the disputed FBI evidence.
Further reading
For more on the intersection of digital privacy and legal proceedings, see the Washington Telecommunications section.
Source note: This article includes information reported by Dcwitness.
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