Background
On March 12, 2021, Larry Thompson was shot and killed outside his apartment in the Spencer Projects area of Omaha. Police used acoustic gunfire detection (ShotSpotter), vehicle surveillance, and digital forensics to investigate. Evidence showed that Dech Gach, then 15 years old and a member of the “Trip Set” gang, traveled to Omaha from Iowa with associates Christopher Trejo, Gatluak Jiel, and Rumbek Augustino for the stated purpose of hunting opposing gang members.
Text messages between Gach and Trejo discussed the planned trip and that Gach would bring a firearm. Investigators recovered seven shell casings from the scene, all from the same 9mm Glock, along with a black latex glove from Trejo’s vehicle containing DNA matching Gach. Both Trejo and Augustino testified at trial that Gach was the shooter.
Gach was charged with criminal conspiracy, first-degree murder, and use of a deadly weapon to commit a felony. At trial, the State presented eyewitness testimony, digital forensics (vehicle OnStar tracking, Life360 location data, phone records), DNA evidence, and gunshot residue analysis. The jury convicted Gach on all counts in November 2024.
The Court’s Holding
The Nebraska Court of Appeals affirmed all convictions, finding sufficient evidence to support the jury’s verdict. The court held that circumstantial evidence—including vehicle tracking data, DNA evidence from the glove, gunshot residue, and eyewitness testimony from co-conspirators—was adequate to prove Gach guilty of first-degree murder beyond a reasonable doubt. The court rejected Gach’s argument that phone data showing activity at 7:50 p.m. proved he was not at the scene, finding it reasonable for a jury to infer that Gach made a phone call, then disabled his phone before committing the murder and enabled it afterward to conceal his involvement.
For the conspiracy conviction, the court found sufficient evidence in the text messages discussing the trip, the firearms they would carry, their stated plan to hunt rival gang members, and their presence together in a vehicle driving through the target neighborhood. For the weapons charge, the evidence that Gach used a 9mm Glock to fire the fatal shots was undisputed.
On sentencing, the court affirmed Gach’s consecutive sentences (12 years for conspiracy, 70 years for murder, 5 years for use of deadly weapon), finding that while the trial judge properly considered statutory mitigating factors required for juvenile offenders under Nebraska law—including age, family environment, and mental development—the sentences remained within statutory limits and did not constitute an abuse of discretion.
Key Takeaways
- Circumstantial evidence and witness testimony from co-conspirators can satisfy the sufficiency-of-evidence standard in murder cases, even without direct observation of the defendant firing the weapon.
- Digital forensics evidence (vehicle location data, phone activity timelines) is not determinative of physical location and presence; juries may draw reasonable inferences about the meaning of such data.
- Gang-related conspiracy evidence—text messages about procuring firearms, planning to hunt in rival territory, and coordinated travel—supports murder conspiracy charges.
- Nebraska courts must consider statutory mitigating factors for juvenile offenders (age, mental capacity, family background) but retain discretion to impose substantial sentences within statutory ranges.
Why It Matters
This decision reinforces the evidentiary foundation for prosecuting gang-related murders in the digital age. Prosecutors need not present a video of the shooting or a direct confession; coordinated planning evidence, digital tracking, forensic analysis, and testimony from participants provide sufficient legal ground for conviction. The court’s treatment of phone data is instructive: the timing of phone activity does not conclusively establish presence or absence, and juries may reasonably infer that a defendant disabled location services during a crime.
The sentencing analysis also clarifies Nebraska’s approach to juvenile offenders convicted of serious felonies. While the state’s constitution and statutes mandate consideration of a young defendant’s age and developmental status, trial judges retain substantial discretion in balancing those mitigating factors against the severity of the crime and harm to the victim. A 15-year-old convicted of first-degree murder may face sentences approaching life imprisonment if within statutory limits.