ATLANTA, Georgia (CNN) -- For more than a year, the criminal justice students jotted details of Chandra Levy's final movements onto a huge timeline taped to a classroom wall, culled the Internet and public records for scraps of information, and pored over the model skeleton laid out on a table in their lab at Bauder College in Atlanta, Georgia.

Antonio Wilson, from left clockwise, Lashaun Bates, Jennifer Gosdin and Charna-Marie Dixon.

They spent hours with the slain intern's mother, Susan Levy, who flew from her home in California to Atlanta just to talk to them. Chandra Levy had studied criminal justice in college, too.

They began with a list of five suspects, then narrowed it down to one. On December 28, they mailed their findings to the police chief in Washington, D.C. They never heard back.

But on Saturday, the text and phone messages began to fly. There's a suspect, they told each other with excitement. An arrest is imminent.

"It completely validates 15 months of work," their teacher, Sheryl McCollum, said that Saturday morning. "We knew this case was solvable. There was no reason for it not to be solved."  Meet the members of the campus crime club »

A week ago, the police chief in Washington, D.C., called Levy's parents and told them a suspect in the 2001 slaying soon would be arrested.

"I got a call from the Washington police department, just to give me a heads up that there's a warrant out for the arrest," said Susan Levy, the victim's mother. She added that police did not provide a name, but sources later identified him to CNN as Ingmar Guandique.

Guandique is serving a 10-year prison sentence for two assaults in Washington's Rock Creek Park that occurred around the time of Levy's disappearance. Levy's remains were found in the park.

For the Bauder College students, the break in the case was no cause for self-congratulations. They can't disclose their findings to the public.

It's part of the deal they make at the start of each investigation. Even though they couldn't name their suspect, or even discuss details of what they found, they didn't carry themselves like people who had missed the mark when they met with CNN on Monday.

There were big smiles and, in more reflective moments, small tears.

Antonio Wilson and Jennifer Gosdin, two students who last year shared logs of their progress with CNN, said they hoped Levy's mother, father and brother can now find some comfort and peace. If they were able to help the Levys in some way, they are glad.

Wilson, who hopes to be a probation officer, said he got more out of the experience than he ever expected. "It's not my area, but I loved it," he said.

"Once you get involved in it, it becomes personal," Gosdin agreed.

For Naomi Barkley and La-Shawn Bates, the case got personal when they met Susan Levy. "You could see the hurt in her face," Bates recalled. "You can't help but want to make it right for her.

McCollum was in Florida with her family when the news of a suspect broke. She was on the phone with Susan Levy before the sun came up in California. Yes, Levy said, it's true, adding that she was grateful to the students for keeping people focused on her daughter's case, McCollum recalled.

McCollum worked as a victims' advocate in the criminal justice system in Fulton County, Georgia, for 25 years before taking a teaching job at Bauder College. In 2005, she launched the Cold Case Investigations Research Institute. It's a fancy name for a campus crime club.

The students aren't graded, and they don't receive class credits. But the payoff for the hours they invest includes hands-on experience working real cases and access to experts and criminal justice professionals.

Using real-life cases is the best way to
who was a suspect? Who recalls Levy's mother being grateful that students kept spotlight on case? who was arrested?
Ingmar Guandique. Sheryl McCollum, Ingmar Guandique.
question: who was a suspect?, answer: Ingmar Guandique. | question: Who recalls Levy's mother being grateful that students kept spotlight on case?, answer: Sheryl McCollum, | question: who was arrested?, answer: Ingmar Guandique.