MESQUITE (CBSDFW.COM) – It has been one year since Lisa Stone disappeared, but her friends haven’t forgotten.

“Lisa’s smile, her contagious laugh, the way she invaded your space when she was trying to make a point,” Tammye Markle, a longtime friend, said Sunday.

A memorial Sunday in Mesquite marked the anniversary of the day Stone vanished from her Dallas home, leaving behind her car, her purse, and personal belongings.

Her partner, Sherry Henry has been labeled a person of interest, but never arrested in the case.

“I’m not guilty of anything,” said Henry, during an interview with 48 Hours on CBS.

Still, three of Lisa’s childhood classmates – Markle, Tina Wiley, and Jodi Shannon – have kept her in the public eye, buying billboards, holding vigils and creating a Facebook page.

“It’s a daily thing. We work on this daily,” Wiley said.

When they caught the attention of 48 hours, the women were nicknamed ‘the Facebook detectives’ for the leads they tracked down by talking to Stone’s friends on the social network.

“We called a lot of people and they would say, I saw her on this date. This was her attitude. Or this is who she was with. And that helped us tremendously,” said Shannon.

Now the trio hopes to use what they’ve learned to help others who are searching for loved ones. They have started a non-profit organization, called ‘For the Love of Lisa’ to offer guidance.

“I think the first thing is – don’t take no for an answer,” said Wiley.

“Go to the police department. Get a timeline. Take pictures. Do whatever you have to do, but just don’t sit back idly and do nothing,” said Shannon.

They realize they may never see Lisa again, but at least, they say, they can give meaning to loss.

“Hopefully this is a way we can honor her forever,” said Shanon.

The organization has already set up a website where it is raising funds through the sale of T-shirts, key chains, and wristbands.

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