LINCOLN HEIGHTS ( —A heartbroken mother is pleading with the public to help find the person who murdered her 22-year-old daughter.

Bree’Anna Guzman was last seen alive the day after Christmas last year.

The mother of two left her Lincoln Heights home on Humboldt Street and went to a Rite Aid a few blocks away. She never returned.

A month later, Guzman’s partially-clothed body was found dumped on a freeway ramp near Riverside Drive in Echo Park.

The victim’s mother, Darlene Duran, told KCAL9’s Suraya Fadel that she still can’t come to grips with what happened and has trouble believing Guzman is gone.

“It’s just the little things she used to do that I really, really miss a lot,” said Duran. “My beautiful girl isn’t with me physically, but she is in my heart and mind. I’m really sad. Not something easy for a mother to face.”

Duran said she can’t fathom why someone would kill her eldest daughter, whose little girl, Jade, was just 12 months old at the time of her disappearance.

“I’m very angry. Bree’Anna was a mother, my daughter and is my children’s sister and a devoted friend to many people,” she said.

The devastated mother said the most troubling fact is not knowing what exactly happened on the day Guzman went missing.

Duran said, “I believe there is someone that saw something or knows the perpetrators.”

LAPD Robbery Homicide Detective Frank Carillo said the murderer has no heart.

“If they did it once, they may do it again. And that is what we are trying to prevent,” he said. “We are not eliminating anyone at this point, we’re keeping all our options open.”

Meanwhile, Duran has a message for her daughter’s killer.

“Come forward and speak. Say something,” she said. “I would feel one chapter closed and I can start to move on with my life.”

There is a $50,000 reward for an arrest and conviction in Guzman’s murder.