Murder victim Melissa De La Garza, 18, had just gotten home from Halloween shopping when she was shot

CHICAGO - SEPTEMBER 28TH UPDATE: Chicago police said detectives are working the case, but no one is in custody.

A Chicago family was reeling with shock on Sunday after their beloved 18-year-old daughter was shot and killed right outside their West Lawn home right after she'd gone Halloween shopping.

Melissa "Azul" De La Garza was shot repeatedly outside the home on South Avers on Saturday night. She was sitting in her car.

"To the cowards that took away the life of Melissa – she liked to call herself ‘Blue’ – for my granddaughter, come forward. You are not going to have peace as we are not going to have peace.  Stop this nonsense,"said her grandmother Clara De La Garza.

Her family struggled to speak on Sunday about the senseless death of their loved one, who had a scholarship to the School of the Art Institute in Chicago.

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"It's hard to put in words the loss we are feeling, for someone to take away my 18-year-old warrior princess," said her dad, Jose De La Garza. "She had a scholarship. She was a wrestler and took second place in state. For someone to come and take that away for no reason – it doesn't make any sense."

Her sister, Isabel De La Garza, said she'd spoken with Melissa just 30 minutes before she was killed.

"The last time I heard from my sister was through a Facetime call. It was a normal day. She was so happy. She had just bought a Halloween costume. She was in her car trying to go home. She seemed so happy in that Facetime call," said her sister Isabel De La Garza. "I don't understand this gun violence to innocent people.

"We need to elect the right officials that will go ahead keep criminals in the prisons so they don't come back out," said Alma De La Garza-Wozniak, the victim's aunt.

"She was a true leader. We all looked up to her," Jose said. "She was a fantastic artist. She was a wonderful person."