A 15-year-old autistic Fairfield boy is missing in what police say is one of the most bizarre situations they've encountered.

"I have never seen anything like it,'' Fairfield police Chief Leon Davis told AL.com. "It's one of those made-for-TV kind of things where people make up the strangest thing they can and then write a story about it."

Davis said Fairfield police and the Department of Human Resources are conducting a joint investigation into the disappearance of Jason Sims, Jr. Authorities in October 2014 first began looking into child neglect claims with Sims' family.

During that initial probe, Davis said, police were aware of two children - ages 10 and 12 - living in the home with the parents - Natasha Wright and Jason Sims Sr. They had no idea the 15-year-old existed, or another child who is 9 years old, until the investigation progressed. "The latter two had never been enrolled in school nor have any medical records been located,'' the police chief said.

Based on conditions of the home and the situation, authorities issued four arrest warrants for both Wright and Sims, charging them with aiding to the dependency of minors. Basically, the chief said, that charge means they weren't doing what they were supposed to do for the children as their parents.

Davis said they tried to serve the arrest warrants in October at the family's home at 112 59th Street. However, he said, the family had gone on the run.

On January 23, Wright was found unconscious at the home. Three days later, three of the children were found with relatives in Mulga and placed in DHR's custody. Wright, who remains in the hospital, briefly regained consciousness and asked authorities about her teen son. She said the last time she was him, he was at their home. She was not able to say when she last saw him.

Lawmen late this morning carried out a search warrant at the Fairfield home in search of the teen and any information that could lead them to him. Because of the mother's illness - which Davis said he couldn't discuss because of medical privacy laws - Birmingham Fire and Rescue's Hazmat Unit assisted Fairfield police and fire in the operation. The teen was not at the home.

Sims Sr. was taken into custody this week, Davis said. He has refused to provide any information on the whereabouts of his son. Some relatives, the chief said, didn't know the teen existed either. "It's odd,'' Davis said.

There are no photographs available of the missing teen. Davis said he is about 5-feet, 6-inches tall and weighs about 125 pounds. Anyone with any information on the whereabouts of Jason Sims Jr. is asked to call the Fairfield Police Department at 205-786-4111.