CHICAGO (CBS) — The family of a young woman stabbed to death on a Red Line train was furious photos and video of her murder were posted to social media, but no one stopped the man who took her life.

“My sister was beautiful, gifted young lady. She didn’t deserve to go the way she did,” said Lorel Hampton.

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She and her mother were grieving over the loss of her 25-year-old sister, Jessica Hampton, who was stabbed to death on board a CTA Red Line train Thursday afternoon on the South Side.

Lorel and her mother were furious about images of the brutal attack going viral on social media.

“This is not a game. This is not a show,” Lorel said.

Crisis responder Dawn Valenti said it’s “very hurtful” for the Hamptons, because they saw photos and videos of the murder before they knew the victim was Jessica.

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“This family was watching that video yesterday. They were looking at the pictures on Facebook that people were spreading, not knowing until 9 o’clock last night that that in fact was their loved one that they were looking at,” she said.

After seeing the video themselves, they also questioned why no one acted to help Jessica.

“Everybody that was there taking pictures, and shooting videos and stuff didn’t try to help her,” Lorel said.

Valenti acknowledged passengers might have tried to help during the attack. That’s what witnesses told CBS outside the scene Thursday, saying they backed off after seeing the knife.

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Police have said the murder apparently stemmed from a domestic dispute. The man who stabbed Jessica was taken into custody shortly after the attack, but has not yet been charged.