RELATED: Gunman on the loose after killing 7-year-old girl as she left Texas Walmart with her mother
A suspect sketch and clearer video of his truck were released Thursday in the hunt for Jazmine Barnes' killer.
NEW, CLEARER VIDEO: Have you seen the shooter's truck?
During a meeting with media on Thursday, Jazmine's mother, LaPorsha Washington, provided a new description of the suspect.
She said he was a white man with blue eyes, wearing a black hoodie and looked "sick" and skinny. Washington said the man did not have on glasses and did not have a beard, which was previously reported.
She also said a red truck was on the passenger's side of her vehicle before the shooting. Washington said the driver of the pickup truck went behind her vehicle before switching lanes and getting on the driver's side.
The suspect then reportedly started firing shots on the driver's side of the vehicle, where Washington was in the driver's seat and Jazmine was sitting directly behind her.
Jazmine's 15-year-old sister, Alexis Dilbert, was able to see the suspect's face.
"You know when you're driving and you look in someone's car and you make eye contact? It was like that," said Dilbert.
The search for Jazmine's killer and the effort to bring him to justice has gained recognition nationwide with celebrities including Gabrielle Union, Olivia Wilde, Ava DuVernay, Bun B and Trae Tha Truth calling on people to help solve her murder.
SEE MORE: Celebrities and activists demand justice for 7-year-old murdered in E. Harris Co.
Jazmine died after investigators say someone in a red, four-door pickup truck pulled alongside her family's vehicle near a Walmart along the east Beltway and Wallisville Road and fired.
"Justice will prevail and I'm going to be leading the charge. I won't stop. I won't quit. I don't care how long it takes," said Chris Cevilla, Jazmine's father.
RELATED: Mom says man 'intentionally' killed 7-year-old daughter near Walmart
Deputies are searching for the truck. The ATF is also conducting its own investigation, analyzing shell casings from the scene and then putting the information in a database to see if it matches any other shootings.
Home video shared of Jazmine shows a happy, bouncing girl. Her family called her Jaz.
Jazmine's mother says she's just trying to make it through this difficult time.
"I'm just here. When I say 'I'm just here', I'm taking it one day at a time and I'm here. I got three other kids that need me to be strong for them and they're going through a lot," Washington told ABC13.
Journalist Shaun King and civil rights attorney Lee Merritt have come together to offer a reward for information leading to the arrest of Jazmine's killer, increasing the amount to $100,000.
If you have any information about the shooting, call the Harris County Sheriff's Office or Crime Stoppers at 713-222-TIPS.
You can also make an anonymous tip online at www.Crime-Stoppers.org.
A Justice for Jazmine rally is planned for this Saturday at noon in the parking lot of the Walmart on the East Beltway.
On Tuesday, Jan. 8, a viewing is planned for Jazmine at 10 a.m., followed by a public funeral at noon.
The service will be held at Green House International Church at 200 W. Greens Rd.
Purple balloons will be released in honor of Jazmine and all murder victims in Houston and Harris County after the service.