"The other places, they just take them down," he said.
His daughter is developmentally disabled and unable to take care of herself.
"Somebody's got her," he said. "Whether it's against her will or voluntarily, we don't know."
Often times, those who go missing are runaways or have lost touch with their families.
Five years ago, Cleveland police were heavily criticized following the discovery of 11 women's bodies in the home and backyard of a man later convicted and sentenced to death.
Police have since changed how they handle missing-persons cases, but activists like Arroyo think authorities need to be more proactive when people go missing. He has met with lawmakers to discuss an idea for issuing notifications when a child is missing or has run away but doesn't meet all the criteria for an Amber Alert.