Greenville police have released photos taken when a slain 16-year-old was getting off her school bus last week.
Alicia Moore was last seen leaving her bus last Friday afternoon. Her body was found in a trunk beside a rural Van Zandt County road on Tuesday.
Surveillance video from the school bus shows a dark-colored Chrysler or Dodge vehicle, possibly a minivan, directly behind the bus when Moore stepped off. Police said they would like to speak with the people in the vehicle as potential witnesses.
The city also released paperwork relating to Moore's disappearance. According to the missing persons report, police first treated the case as a runaway. The report says that Moore's mother told police she thought her daughter may have run away and was in the company of an older man.
With no arrests in the case, the town of Greenville remains on edge.
"I usually walk a lot, but here, lately, I've been getting a car ride," Greenville High School student Cielo Reyes said. "Everybody is pretty scared right now to even walk anywhere."
Students wore purple -- Moore's favorite color -- on Friday.
Reyes made a special shirt for the occasion and bought purple shoelaces.
"She was always on time," he said. "She was dedicated to school, and she was just really sweet. There was no reason."
Police refused to take questions about the case Friday.
City spokeswoman Lori Philyaw said the entire force was busy working the murder case and could not be disturbed.
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The Greenville Independent School District sent letters home with students to parents Friday, urging them to be vigilant with the chance that a killer is still on the loose.
"I guess we're all probably a little jumpy on that, but I'd rather err on the side of safety and caution than have something like this happen again," Superintendent Don Jefferies said.
A man accused of sexually assaulting Moore was arrested in August, but he was in jail at the time she was killed.
NBC 5 generally does not identify victims of alleged sexual assault, but Moore's identity was made public before NBC 5 learned of the allegations.
Another Greenville man was arrested Thursday on unrelated family violence charges. His family said investigators spoke about the Moore case.
But as of Friday, no one had been charged with her killing.
Greenville area businesses pitched in to offer a $15,000 reward for an arrest in the case.
Moore's family spent the day making funeral arrangements with help from community contributions.