Juan Turcios is charged with capital murder in the death of 21-year-old Luis Ruiz.
Turcios is accused of trying to rob Luis and intentionally causing his death by shooting him. The suspect is in custody.
Two more people have already been charged with capital murder in the death of Luis and his 20-year-old sister Jessica.
On Monday morning, Juan Bartolo, 18, was charged with capital murder.
Court documents say Bartolo "knowingly and intentionally" caused the deaths of Luis and Jessica by shooting them. His bond was set at $500,000.
According to court records from the Harris County District Attorney's Office on Sunday, 22-year-old Roger Salazar was the first person charged in the killings, alleging that he also "intentionally and knowingly" caused the deaths of Jessica and Luis with a firearm.
The deadly shooting occurred March 10 on Ranchester Drive when the siblings, along with three other people, got into a confrontation with two men in a sedan. At some point, the men left, then returned and opened fire.
Four people were shot, including 55-year-old Josafat Ocampo Mesa, a relative of the Ruiz siblings.
Mesa was also killed in the shooting.
Family told Eyewitness News he was a son, brother, cousin and "the best uncle they could all have." The fourth victim, an 18-year-old woman who survived, was rushed to the hospital. The fifth person at the scene was not injured.
The sister of Luiz and Jessica set up a GoFundMe page for anyone interested in helping to pay for their funeral expenses.
The video above is from a March 11, 2021, report filed early on in the investigation of the shooting.