The Houston teenager already held on a capital murder charge is now accused in federal court of carjacking and using a gun in the killing of an Austin woman.
HOUSTON, Texas — Federal prosecutors have filed new charges against an 18-year-old already accused of capital murder in the fatal carjacking of an Austin woman who had come to Houston to help a friend through cancer treatment, adding a second court track to one of the city’s most closely watched recent homicide cases.
The added federal counts sharpen the legal stakes for Darius Dewayne Hall, who had already been ordered held without bond in Harris County after authorities said he shot 61-year-old Marietta Allison during an attempted robbery on March 6 in the Heights. Prosecutors say Allison was attacked after she dropped off a friend who had spent the day receiving care at MD Anderson. The federal case centers on the stolen vehicle and the gun allegedly used in the crime, while the state case still carries the most serious accusation: capital murder.
According to police and court records, Allison had just finished a long day helping her friend, Cassie Daniel, and drove back to an apartment area near W. 20th Street and Lawrence Street late Friday night. After unloading luggage and dropping Daniel off, Allison parked a 2019 Toyota Highlander on the street and began walking back toward the apartment. Prosecutors said a masked man approached her and tried to steal her purse. When Allison resisted, the attacker shot her once in the neck. Witnesses reported hearing a scream followed by a popping sound. Officers found Allison wounded and rushed her to Memorial Hermann, where she later died. Within about 45 minutes, police located the Highlander and began pursuing it after an attempted stop.
Investigators said the chase covered roughly 10 miles before the SUV crashed near the 3100 block of the Southwest Freeway in the Upper Kirby area. Authorities said Hall then ran, discarded clothing and entered a vacant apartment or townhome, leading to a SWAT standoff that ended with his surrender early the next day. Prosecutors later told a judge that Hall admitted evading police and admitted being in the stolen vehicle, but denied firing the shot that killed Allison. Court records show he was charged in state court with capital murder, evading arrest and tampering with evidence. Prosecutors also said an underage girl later told police Hall picked her up after the carjacking, had two guns in the vehicle and reacted angrily when she asked where the SUV came from.
The federal charges announced Tuesday add a carjacking count and a firearms count, a move that drew notice because Hall was already facing a capital murder prosecution in county court. Federal officials said the vehicle’s interstate connection gave them jurisdiction because it had been manufactured outside Texas. That detail turns a local street crime into a case that can be pursued under federal carjacking law. The penalties are severe. Federal officials said the carjacking count can carry up to life in prison or, in some circumstances, the death penalty, while the related gun count carries a long prison range that can stretch from 10 years to life. Each count also can bring a substantial fine if there is a conviction.
The case has also renewed attention on Hall’s juvenile record. Prosecutors said he was on probation in juvenile court at the time of the shooting for offenses that included aggravated robbery, aggravated assault, motor vehicle theft and evading arrest. In open court, prosecutors said that earlier case resulted in a 10-year juvenile sentence with part of it probated through 2027. Hall’s adult criminal history, by contrast, appears limited to the current case. His attorney, Jose Julio Vela, said after an early hearing that Hall was still trying to understand the seriousness of the allegations against him. The attorney also signaled that future hearings would focus on Hall’s family ties, education and state of mind as the defense prepares for the next stage of the case.
For Allison’s friends, the legal escalation has done little to soften the loss. They have described her as the kind of person who changed plans without hesitation to care for others. Karin Galindo said Allison cut short a trip to Istanbul so she could help a close friend through cancer treatment in Houston. “She was an amazing soul, a bright, bright light in this world,” Galindo said, describing a woman whose life was shaped by generosity and urgency. Daniel, the friend Allison had accompanied to treatment, said the federal charges mattered because they signaled to her that the case would receive close scrutiny in more than one courtroom. By Wednesday, Hall remained jailed, the state murder case was still pending, and a March 23 hearing was expected to address whether bail should be denied as the federal prosecution moves toward an initial court appearance.
Author note: Last updated March 11, 2026.