Christopher Alex Rubio, a 40-year-old Hispanic male, died on March 31, 2019, in Dallas, Texas, after being shot at his home in the 2700 block of West 12th Street in Oak Cliff. Neighbors reported hearing an argument and a pop later identified as a gunshot; one neighbor saw Gilbert Martinez standing over Rubio and urging someone to call 911 if they wanted Rubio to live. Rubio told Dallas Fire-Rescue while being taken to Methodist Central Hospital that his roommate had shot him and that the weapon was likely a 9-millimeter handgun.

Rubio died at the hospital from his injuries. Police recovered a 9mm handgun at the residence and arrested Gilbert Martinez, who was charged with murder.

What did neighbors or anyone in the area see or hear that night that might help clarify what happened?