Leroy Sanchez, 22, of Victoria, was standing outside a friend's home when a group of men pulled up in a silver SUV and shot him about 7:30 p.m.
One of Sanchez's older brothers, Jose Sanchez, 25, said he thinks the shooting is gang-related after speaking to an eyewitness.
He was told by the eyewitness that a group of about six men pulled up to the house in the 900 block of South Navarro Street in a silver SUV and got out of the vehicle "pretending to say hello."
The eyewitness said as soon as the victim recognized who they were, he tried to run back into the house but was shot at least once from behind.
"He didn't have a chance to do anything," the older brother said.
The eyewitness said the men shouted a gang name as they fired several shots at Sanchez.
Paramedics performed CPR on the victim as they took him to DeTar Hospital Navarro, where he was pronounced dead.
The Victoria Police Department identified Sanchez as the victim Monday morning.
According to Victoria public records, Sanchez had a criminal history, including engagement in organized criminal activity, aggravated assault causing severe bodily injury and aggravated assault with a deadly weapon.
The police department is following up on several leads but could not release specific details because of the "sensitive nature of the case," said Detective Tanya Brown, spokeswoman for the department.
As of Monday night, no arrests had been made.
Although frustrated that his brother's killer was still "out there in the streets," Jose Sanchez positively reflected on the life of his younger brother, who was the father of a 4-year-old girl.
"He loved his daughter very much," he said. "His daughter will miss him a lot."
"He was one of the youngest ones of our family, and now he's gone before all of us."