Joshua Orta, a key witness in the controversial ICE killing of 23-year-old U.S. citizen Rubén Ray Martínez, died Saturday in an unrelated vehicle crash in San Antonio, Texas. Orta's death raises concerns about the ongoing investigation into Martínez's death, which occurred last March but was not reported by the Department of Homeland Security at the time. DHS claimed an ICE agent shot Martínez in self-defense after he struck the agent with a vehicle. However, Orta, who was present during the encounter, disputed this account, stating neither he nor Martínez resisted ICE officers. Alex Stamm, lawyer for Martínez's mother, emphasized that Orta's testimony was critical and called for all evidence to be made public. DHS maintained its original account of the incident following Orta's death.Watch video below. Your browser does not support the video tag.