- Turning now to the latest on Uvalde, the Texas town that lost 19 children and two teachers in a horrific school shooting last year, and it struggled to heal. John Quinones has been reporting in the community for months and is back in Uvalde this morning. Good morning to you, John. - Good morning, Linsey. This is a story that touched a lot of us deeply. It's a story of injustice born from a false accusation. But this morning, it's a story with a little bit of a silver lining. JOHN QUINONES: This morning, the Robb Elementary staffer at the center of controversy speaking out-- Emilia Amy Marin after the trauma she underwent following the mass shooting last May. - I tell myself that I have to be strong, and I have to stay positive and think positive. JOHN QUINONES: We told Amy's story on GMA last October, how she was falsely accused by Texas authorities of leaving a back door open at the school-- the door through which the shooter entered on May 24 and began his rampage. - The exterior door, where we knew the shooter entered, was propped open by a teacher. - He said, a teacher left the door propped open. And I looked at my daughter, and I said, that's a lie. JOHN QUINONES: The Texas Department of Public Safety had actually not named her. That was done by Amy's lawyer as her name spread in Uvalde-- her lawyer demanding an apology. The DPS later retracted their statement that a teacher had left the door open, admitting that Amy had closed the door behind her. Security video clearly showed that. DPS director Steve McCraw apologized. But by then, Amy felt vilified in her own community. When we met her last fall, her body shook. She spoke with a stutter, suffering from anxiety and depression. After we told Amy's story on GMA, she received letters from all over the country. - "I am a retired teacher of 43 years. I can put myself in your place-- to not let this destroy your health and future happiness." JOHN QUINONES: The woman once considered a pariah in her own town is doing better now thanks to all that support and therapy, including treatment sessions with a therapy dog. - What did those letters do for you? - They give me strength. They give me courage. I read them because I want to remind myself that there's people out there that are praying for me. JOHN QUINONES: Since the shooting, Amy had refused to even go past Robb Elementary. But a few days ago, she asked ABC News to come with her. And with her daughter at her side, Amy finally walked to the front gates of the school where she made an impassioned plea to the part of her still inside that building. - [SOBBING] I want me to get out of there. - Clearly, clearly, Amy is finding her voice again and gaining strength. She tells us she now plans to join other families of the victims here in Uvalde in the fight against injustice, shining a light on the things that went wrong here. Linsey? - So emotional and impactful. John, thank you.