Eve Walker was in Mexico when her husband's and Radelat's bodies were found. She and Radelat's parents had been pushing for information from Mexican authorities.
"My mom just kept knocking on doors," Walker Muse says. "People in Mexico were stonewalling her. American officials really didn't know much. It was a nightmare."
Eve Walker learned her husband was dead when Mexican news reported it, and journalists back in Minnesota began calling her hotel room.
The Walker girls were staying with a family friend. Eve Walker immediately called home, warning their sitter to make sure the kids didn't see the news.
But Keely was too savvy.
She knew that newspapers got delivered to her elementary school teachers so she took a peek and saw the front page headline. "It was like, OK, childhood's over."
Eve Walker was reeling.
She had to identify her husband's body at the morgue.
"It was only a skeleton, but not just a skeleton," she later testified in court in Los Angeles. "There were parts of his body still on him -- one of his eyes, his overlip ... his mustache. It was John. It was, unmistakably, John."
When the widow returned to the States, she and her daughters struggled, Walker Muse remembers.
"I became the adult," she says.
It took about a year for Eve Walker to get back to some semblance of normalcy. But the murder always hovered over the family.
Camarena's death dominated headlines when the crime occurred and it's dominating headlines now with Caro Quintero's release. That has made Walker Muse cynical. She's come to expect that when something gets written about the cartel's victims, her father will be lucky to get a passing reference.
Walker Muse even worked on a PBS series about the Mexican drug war several years ago that barely mentioned her dad, but devoted a lot of attention to the slain DEA agent.
She knows she could have spoken up, but generally it was too painful and she wasn't ready or didn't really want to get into her dad's story.
Now that Caro Quintero is free, though, she wants everyone to know who her father was.
"I'm sorry for what happened to Camarena. But he was a DEA agent. He was doing a job. My dad was just a dude going to dinner."
Walker Muse's younger sister, Lannie Walker, grew up to be a journalist, like her father.
"I hope to continue a career he was never able to finish," she tells CNN. "Every day I think of the milestones I missed because of his murder. I think of how I never got to know him as an adult. I wonder if he would be proud of me and I wonder what type of advice he would give me. I still ache for his hugs every day."
John Walker, a former Marine, was awarded two Purple Hearts in Vietnam, his daughters say, after he stepped on a landmine and almost lost both his legs. He helped the family survive on what little his military pension afforded, and his daughters grew up with a sense of worldliness and a love for other cultures. Lannie reports overseas.
The entire family lived in Guadalajara from 1983 to 1984, before Eve Walker and the girls returned to Minnesota and John Walker went back to finish his novel.
The sisters loved it, Walker Muse recalls, showing a photo of them side by side in front of the family pool. "It was like paradise," she says.
"My dad was funny because his Spanish wasn't that great so whenever someone said something to him, he was like, 'Ah, no problemo,'" she says. "He was easygoing. That was his personality."
And he was determined. He finished that novel.
Walker Muse has copies of it.