Law enforcement officials on Sunday identified the man who also wounded 22 people in the shooting spree Saturday in West Texas as Seth Ator, 36. He was killed by police.
The people killed ranged in age between 15 and 57, authorities said.
Granados was on the phone with her twin sister, Rosie, when she started screaming, the surviving twin said.
“It was very painful. I just wanted to help her, and I couldn’t. I thought she had got bitten by a dog or something,” Rosie Granados said sobbing in a phone interview with CNN. “I tried calling her name and she wouldn’t answer.”
The gunman hijacked Granados’ mail vehicle, said Silvia Torres, a spokeswoman with the USPS Inspection Service.
Rosie knew her sister’s route and went looking for her, she said.
“We are all broken. We are all suffering,” Rosie said. “She was very friendly and was always smiling.”
She said Granados’ cats have been yowling for her.
The Granados sisters moved from Juarez, Mexico, to Odessa when they were 14. Granados worked for the US Postal Service for about a year, her sister said.
The USPS Inspection Service confirmed Granados’ death.
Granados loved to travel with her boyfriend and spend time with her family.
She didn’t feel well on Saturday but still went to work, her sister said.
Mckayla Salcido’s doorbell camera captured Granados delivering the mail to her home in Odessa more than three hours before the shooting. It is one of the last known images captured of Granados before she was killed.
Granados was nearing the end of shift when she was killed, her sister said.
“It’s hard for me,” Rosie Granados said, “because she’s my twin.”
CNN’s Andrea Diaz, Faith Karimi and Ed Lavandera contributed to this report.