20-year-old woman murdered, killer caught on camera

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A 20-year-old woman is found dead in her apartment. Cops say her killer is caught on camera but he still isn't in custody. Police hope you can help catch him. 

When you look at the video you might simply see a guy getting off the elevator and walking through an apartment building lobby, but investigators say what you’re seeing is a murderer escaping his crime. 

"On November 4, 2015 the suspect visited the victim in her apartment. She did let him in. He proceeded to assault her and cut her neck,” explains Houston Police Officer D. Crowder.

"How can you live with yourself knowing that you killed somebody?” cries Krystina Scott. Scott's little sister 20- year-old Shelbey Thornburgh was in her own apartment in a high rise on Bellaire Boulevard when she was murdered.

"Shelby was a very loving person.  She had so many friends and so much family that cared about her,” adds Scott.

"We do not believe the victim and the suspect knew each other for any period of time. They appear to have met this night and we don't know the circumstances,” explains Crowder. 

Investigators say after examining phone records, the guy's number was tracked to a non-traceable Trac Phone. 

Detectives say surveillance video shows the man arriving at 9:00 p.m. and leaving less than an hour later at 9:40 p.m. Although he was leaving the building at night, he is wearing sunglasses. 

”We believe it was to conceal his identity,” says Officer Crowder.

"My sister was my best friend”. Scott says her sister wanted to be a model, was funny and enjoyed life. In fact, days before her death the 20-year-old went to a Halloween party. 

"She was dressed as an Easter bunny.She had so much fun. She just lit up with joy when she told me about what she did,” explains her sister.

There is a $5,000 reward if you can help officers catch this man who’s now wanted for murder. 

"I'm begging y'all. She was only 20 and didn't deserve to have her life taken away,” says Scott.

If you have information that can lead this family to justice, you can call Houston Crime Stoppers anonymously at 713-222-TIPS.