By Jaie Avila
SAN ANTONIO - It's been 25-years since San Antonio was rocked by one of the most chilling crimes in the city's history: The abduction and murder of Heidi Seeman.
The 11-year old's disappearance galvanized people around the city to search for her, and led to the opening of the Heidi Search Center.
Vanessa Tate-Winn, one of the volunteers who searched for Heidi Seeman, showed us the stretch of Stahl Road on the far Northeast side, where Heidi disappeared on Saturday, August 4th, 1990.
Heidi spent the night at a friend's house and the next day her friend walked her part of the way home, leaving Heidi to walk the rest of the way alone.
"As a volunteer, I was 21 at the time, I became very emotionally involved with it, a lot of people did. It's heartbreaking that it's still not solved," Tate-Winn says.
Investigative documents obtained by the Trouble Shooters in 2010 show investigators focused from the beginning on Robert Eric Duncan, an Air Force Major who worked with Heidi's father at Randolph Air Force Base.
Duncan helped lead the search efforts for Heidi in the days following her disappearance. A co-worker told investigators Duncan had once threatened to get even with Heidi's father because of a dispute at work.But Duncan was never charged and has repeatedly denied having anything to do with the murder.
Bexar County District Attorney Nico LaHood says the Texas Rangers are now in charge of Heidi's case, but there've been few developments in recent years.
"There have been suspects in the past and they've been investigated thoroughly, and right now we have no one we can charge with a crime," LaHood told News 4.
Heidi's friend did help investigators come up with a composite drawing of a man she says drove past her and Heidi three times the morning of the abduction, in a red car.
Five years ago the Trouble Shooters went along as Heidi's parents, Curt and Teri Seeman, gathered with investigators and volunteers in Wimberley. That's where Heidi's body was discovered, wrapped in trash bags, three weeks after she disappeared.
But there will be no such ceremony this year.
Instead Heidi's parents are remembering their daughter in seclusion at their home in Florida. Over the phone they told us how they'll pay tribute to Heidi.
"It's going to seem a little strange to you but we're actually going to stay home and we're going to have macaroni and cheese with hot dogs. That was Heidi's favorite meal," Curt Seeman said.
"We'll be thinking about good memories and we're going to be smiling and celebrating her life while we have that macaroni and cheese and hot dogs," Teri Seeman added.
Heidi's mother says for 24 years she held out hope the killer would be found.
"But last year I realized that it's going to be twenty-five years. So my head says no, after all this time it's not going to be solved," Teri Seeman said.
"I just hate to think that there's somewhere out there a child murderer that's still out there and he might do it again," said Curt Seeman.
Heidi's parents say their daughter's legacy is the Heidi Search Center, established by some of the volunteers who helped search for her and still operating today. It helps families get the word out about loved ones who go missing.