The neighbor, Rolando Lozano, said the girl had come to his home and asked his wife if she could use the bathroom because her family's house was locked and no one was home.
"She came to ask my wife to use the restroom and that's when I figured there was something wrong," Lozano told KTRK-TV.
Rosabella waited with the Lozanos while Dahu hurried home.
"I was shaking, I was scared, I was just glad to see her in good health and that nothing happened to her," Dahu said.
Dahu said he discovered Rosabella had forged a note from her parents saying she was supposed to take the school bus home instead of attending the after school program.
The father said he was shocked that Rosabella's note, which is in a child's handwriting, was able to fool teachers.
"You can clearly see she did not even spell the word 'bus' right," Dahu said.
Rosabella also used the wrong spelling of "to" in her note.
The note reads: "I want Rosabella to go too dus 131 today. To: Ms. Reign."
The Sheldon Independent School District said it is investigating the incident.
The district released a statement saying:
"Sheldon ISD is currently investigating the situation. We are reviewing our training procedures to ensure that our after-school grant program staff is properly trained in dismissal procedures. As we move forward, the district is working to make sure that all of our after-school grant staff receives the same training as district employees. At this point, the district is continuing to investigate and will take proper disciplinary action. As always, student safety is our top priority."
A 7-year-old girl in Des Moines, Iowa, had less success with note forgery in January when she went for a different tactic: trying to fool her parents with a fake note from the school. The note, signed "Cara G," sought to convince the girl's parents that the school had extended winter break for an extra week. The girl's parents were not duped, and quickly noticed she had written "brake" instead of "break."