AURORA, Colo. -- The mothers of two college students who were gunned down Monday night are determined to find the couple's killers and they want the public's help.

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Parents Of Murdered Sweethearts Want Justice

Recent Colorado State University graduates Javad Marshall-Fields and Vivian Wolfe were engaged to be married. Marshall-Fields was supposed to testify at a criminal trial next week but he and his fiancée were ambushed and executed as they drove onto Dayton Street in Aurora.

"He gave her a ring about three weeks ago, and we as a family have decided to lay them to rest together, so they're going to be buried together, so they don't have to be alone," said Rhonda Fields, Javad's mother, struggling with her tears.

The couple died in a hail of gunfire. At least 12 bullets hit the victims' car. On Thursday, the mothers of both victims issued a public plea for witnesses to come forward.

"This happened at eight in the evening," Fields continued. "Someone has heard something. Someone has seen something. ... Someone knows the truth (and) someone needs to tell it. These monsters took the lives of two very innocent young people."

She choked back tears as she talked about the couple's bright future.

"If you look at his smile, you can tell he lit up the world with that smile," Fields said. "He was tall, handsome and bright. He was a natural leader and he loved life."

The 22-year-old student leaders meant a great deal to CSU, said school President Larry Penley.

"They will be remembered with warmth, tenderness and sincere respect for what they gave to this institution and to the people with whom they lived, worked and studied," Penley wrote in an address to the campus. They were truly determined "to make a difference," he said.

Marshall-Fields had just returned from a job interview in Maryland and the couple was planning to settle in Virginia.

Police haven't ruled out the possiblity that Marshall-Fields was killed because he was about to testify in a murder trial. That trial has been delayed and now other witnesses in the case are asking for protection, 7NEWS reported.

"It's a war against the criminals that committed this crime," said Maisha Pollard-Fields, Javad's sister. "I want every criminal who has any connection to this crime to know that we are going to hunt you down. ... We're looking for you in every nook and cranny. We are going to be on the streets. We are going to be in churches. We are going to be everywhere that you think we are not, looking for you."

"Somebody knows somewhere out there," said Christine Wolfe, Vivian's mother. "Don't be scared. If you don't stop crime, violence and guns ... next time, very soon ... it's going to be your kids, your boys, your daughters."

The district attorney's office said it will offer witness protection to anyone who comes forward with information about the shooting.

Last Fourth of July, Marshall-Fields was injured during a shooting at Lowry Park. His friend, Gregory Vann, was shot and killed. Marshall-Fields identified Robert Keith Ray as the person who drove the getaway car. Ray is charged with being an accessory to murder and his trial was supposed to begin next Monday.

Aurora police said that they have not had a chance to interview Ray about the recent shooting.

Marshall-Fields told his family that he had been threatened and was nervous about testifying, but police said that they were not aware of the threats.

The family's pastor is helping to raise more money for the Crimestoppers reward fund, which now stands at $10,000. Anyone who has information leading to the arrest of the killers will be eligible for the reward.

Anyone with information regarding the case is asked to call Aurora Police Department at (303) 739-6013 or CrimeStoppers at (720) 913-STOP (7867).