Story highlights Trayvon Martin, 17, was shot dead by George Zimmerman on February 26, 2012

Zimmerman says he acted in self-defense; Martin's family says the black teen was profiled

Martin's mother says she wants to ensure others don't suffer the pain she has

"We're going to accept" a jury's verdict on the case, even if we don't like it, she adds

The final, violent moments in the life of their son, Trayvon Martin , no longer dominate the national news, as they once did. Tens of thousands no longer attend rallies demanding justice for the slain teenager; pundits no longer debate the case on every media platform imaginable. What once had been the big story has increasingly become yesterday's news.

But Sybrina Fulton and Tracy Martin haven't stopped fighting.

One year ago Tuesday, they were grieving and relatively anonymous parents, trying to come to grips with the sudden death of their 17-year-old son. But in time, they became celebrities of sorts in a world of gun violence and vigilante justice.

To their supporters, they were the faces and the voices of victims of racial profiling.

While the spotlight largely has faded since then, they say their commitment has not.

"We (want to) make sure that no other parents have to go through what we have gone through in the last year," Fulton told CNN's Piers Morgan on Monday night.

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Photos: Photos: Trayvon Martin evidence Photos: Photos: Trayvon Martin evidence Trayvon Martin evidence – A photo posted online Monday, December 3, shows George Zimmerman with blood on his nose and lips. His attorneys say it was taken the night unarmed teen Trayvon Martin was killed in Sanford, Florida. Zimmerman, 28, faces second-degree murder charges in the death of Martin in Sanford, Florida, on February 26, 2012. Other evidence photos were released earlier this year: Hide Caption 1 of 10 Photos: Photos: Trayvon Martin evidence Trayvon Martin evidence – Zimmerman says he shot Martin in self-defense. Martin's attorneys say he was shot and killed "in cold blood." Hide Caption 2 of 10 Photos: Photos: Trayvon Martin evidence Trayvon Martin evidence – Zimmerman said that before he shot the teenager, he was "assaulted (by Martin) and his head was struck on the pavement," according to a police report. Hide Caption 3 of 10 Photos: Photos: Trayvon Martin evidence Trayvon Martin evidence – According to a fire department report, Zimmerman had "abrasions to his forehead," "bleeding/tenderness to his nose" and a "small laceration to the back of his head" when he was treated at the scene. Hide Caption 4 of 10 Photos: Photos: Trayvon Martin evidence Trayvon Martin evidence – In a photo released by the Sanford Police Department, Zimmerman's hands appear to be unmarked. Hide Caption 5 of 10 Photos: Photos: Trayvon Martin evidence Trayvon Martin evidence – Prosecutors allege Zimmerman unjustly killed Martin, an unarmed teenager, after profiling him. Zimmerman has pleaded not guilty and claims self-defense. Hide Caption 6 of 10 Photos: Photos: Trayvon Martin evidence Trayvon Martin evidence – Zimmerman's gun is displayed. The shooting raised questions about gun laws, as well as the merit of the "stand your ground" law in Florida and similar laws in other states. Hide Caption 7 of 10 Photos: Photos: Trayvon Martin evidence Trayvon Martin evidence – Crime scene photos released by the Sanford Police Department show Trayvon Martin's cell phone at the scene of the shooting. Hide Caption 8 of 10 Photos: Photos: Trayvon Martin evidence Trayvon Martin evidence – Evidence marker 2 shows a plastic sack found at the crime scene. Hide Caption 9 of 10 Photos: Photos: Trayvon Martin evidence Trayvon Martin evidence – A can of Arizona iced tea was found on the ground at the Martin crime scene. Hide Caption 10 of 10

On February 26, 2012, her teenage son was walking back to the Sanford, Florida, home of his father's fiancee after picking up some Skittles and an iced tea at 7-Eleven. That's when, and where, then-28-year-old neighborhood watch volunteer George Zimmerman spotted him.

What happened between then and when Zimmerman fatally shot the teen is subject to dispute, one that could be settled by a jury starting June 10, when Zimmerman is set to go on trial on a second-degree murder charge.

As the prosecution and defense lawyers battled in court in the weeks and months that followed, Trayvon Martin's parents became less visible on the national scene.

But they've still been active, said Fulton, including continuing to work on behalf of the Justice for Trayvon Martin Foundation , which they started.

They held a benefit dinner for the nonprofit organization, as well as a peace walk in Miami "to let teenagers know they have a right to walk in peace," she said Monday. On Tuesday, the anniversary of their son's death, they'll be in New York for a candlelight vigil.

Their efforts include continuing to speak out on issues. Among them is gun violence, a debate over which is brewing in Washington and nationwide after several grisly mass shootings, including one that left 20 children and 6 adults dead at a Connecticut elementary school last December.

"It's just too much senseless violence; it's overwhelming the homes right now," Tracy Martin said Monday, referring to the Newtown massacre as well as murders in places like Chicago. "We, as parents, certainly feel the pain."

Even as they continue to fight, Trayvon Martin's parents acknowledge that -- after months in the spotlight, trying to ramp up pressure on authorities to go after Zimmerman -- much about their son's case is now out of their hands.

Their lawyer, Benjamin Crump, on Monday asked rhetorically if Zimmerman is "not held accountable, what message does that send to the next child that's killed, unarmed, on the ground?"

Still, Sybrina Fulton said that, to a large extent, she and her ex-husband have gotten what they asked for. Zimmerman was arrested and, unless something unforeseen happens, he will stand trial.

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Photos: Stigma for town in Trayvon Martin killing Photos: Stigma for town in Trayvon Martin killing Stigma for town in Trayvon Martin killing – Memorials to Trayvon Martin grow daily outside The Retreat at Twin Lakes, the gated Sanford, Florida, community where neighborhood watchman George Zimmerman shot and killed the unarmed teen February 26. The death has sparked protests across the country and brought unwanted attention to Sanford, a town north of Orlando. Hide Caption 1 of 11 Photos: Stigma for town in Trayvon Martin killing Stigma for town in Trayvon Martin killing – Sanford's main roads are dotted with mini strip malls in between patches of what remains of central Florida's agricultural history. Views about the Martin case depend on which streets you stand on in Sanford. Hide Caption 2 of 11 Photos: Stigma for town in Trayvon Martin killing Stigma for town in Trayvon Martin killing – "I don't see Sanford as being a prejudiced town by any means," said Michelle Simoneaux, left, manager of downtown's Colonial Room Restaurant and Fountain. "This could happen anywhere, but it doesn't happen every day. " Hide Caption 3 of 11 Photos: Stigma for town in Trayvon Martin killing Stigma for town in Trayvon Martin killing – A neighborhood watch sign marks the gated community where Martin died. Zimmerman has said he killed the teen in self-defense, police said. Hide Caption 4 of 11 Photos: Stigma for town in Trayvon Martin killing Stigma for town in Trayvon Martin killing – Members of the Goldsboro community play a game under an oak tree. Goldsboro was one of Florida's earliest towns incorporated by African-Americans before Sanford absorbed it and took over in 1911. Residents speak of frequent police patrols in the area and other cases similar to Martin's. Hide Caption 5 of 11 Photos: Stigma for town in Trayvon Martin killing Stigma for town in Trayvon Martin killing – A protest sign painted on the window of a car at a housing project calls for Zimmerman's arrest. For some, the Martin case has become a rallying cry, a chance to air what they believe are years of grievances. Hide Caption 6 of 11 Photos: Stigma for town in Trayvon Martin killing Stigma for town in Trayvon Martin killing – The Martin killing has been the subject of intense coverage in local newspapers as well as the national media. Hide Caption 7 of 11 Photos: Stigma for town in Trayvon Martin killing Stigma for town in Trayvon Martin killing – Longtime resident Myranette Boynton, 58, says she thinks the attention to Sanford will make a difference. "This occasion has happened too many times, and enough is enough," Boynton says from the banks of Lake Monroe. "Trayvon is not the only one, but Trayvon should be the last one." Hide Caption 8 of 11 Photos: Stigma for town in Trayvon Martin killing Stigma for town in Trayvon Martin killing – A handwritten card lies among the memorial gifts outside the neighborhood where the high schooler died. Hide Caption 9 of 11 Photos: Stigma for town in Trayvon Martin killing Stigma for town in Trayvon Martin killing – A woman strolls through the downtown area. Many residents say they wonder whether Sanford will forever be known as the place where an unarmed black teen was killed while heading home from the store. Hide Caption 10 of 11 Photos: Stigma for town in Trayvon Martin killing Stigma for town in Trayvon Martin killing – Signs about the shooting have been posted throughout the Florida city, and the message is clear: People want answers. Hide Caption 11 of 11

"We just want to have that trial, and let the jury decide," she said. "And whatever decision comes out of that, we're going to accept that.

"We may not like it, but we're going to accept it."

The jury will have to decide between two starkly different versions of what happened that night.

Zimmerman told police that, after the two exchanged words, Martin went after him. According to his account, the teen, who didn't have any weapons on him, punched him, forced him to the ground, and slammed his head on the concrete. That's when Zimmerman shot Martin in self-defense, he claims.

Martin's family and supporters, though, have long had a different story.

One of the first to tell it was Tracy Martin, who initially addressed reporters last March 8, trying to raise the case's profile and hike pressure on authorities. He and, soon, others suggested Zimmerman had targeted his son, an African-American youth wearing a hooded sweatshirt, because of his race.

The parents' legion of supporters grew exponentially as the weeks wore on after the shooting, with no one charged. They created a petition on the website Change.org calling for Zimmerman's arrest. Within a week, it was the second most-popular petition in the website's history, with 877,110 signatures.

Protests drawing thousands of people sprung up nationwide demanding "Justice for Trayvon" and blasting local authorities' response. As their reason for not immediately arresting Zimmerman, police cited Florida's "stand your ground" law, which states that people who feel threatened don't have to retreat from danger and can use deadly force to protect themselves.

Zimmerman was charged on April 11, with a probable cause affidavit stating he "profiled" Martin and disregarded a 911 dispatcher's request that he wait for police.

The weeks that followed produced more news. For example, Zimmerman posted $150,000 bail, only to have it revoked after the judge said he'd mislead the court about his financial situation, including tens of thousands of dollars he'd raised online for his defense fund.