911 call released in case of missing Illinois boy

The call was made by AJ Freund's father after he realized his son was gone.
1:47 | 04/23/19

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Transcript for 911 call released in case of missing Illinois boy
Back home to the search for a missing 5-year-old boy. For the first time, we hear the father's voice calling 911. The mother has stopped cooperating with police. The scent only found in the boy's home. Here's Alex Perez. Reporter: We're hearing the family's first call to 911 six days after the child vanished. We have a missing child. Reporter: A.j.'s father telling police he last saw their 5-year-old son in their crystal, Illinois, home. When was the last time you've seen him? Last night, probably 9:30, when he went to bed. I had a doctor's appointment this morning. When I got back from the doctor's appointment and I checked in on him, say good morning, and he wasn't there. Reporter: Andrew Freund also describing where the family searched for A.J. Do you know where he might have went? No. We've canvassed the neighborhood, went to the local park, local gas station where we sometimes take him to buy treats. I have no idea where he would be. Reporter: For days investigators have scoured the area for the boy. They do not believe he was abducted. And say K9s picked up a.j.'s scent only in the home. Not yuds. Police calling the home a crime scene. A.j.'s mother maintains her innocence, but is refusing to cooperate with police. Both are trying to regain custody of their son after he was taken into care after a.j.'s disappearance. Alex, thank you. Next to the major new headline in the race for 2020. Former vice president Joe Biden will announce he's running this week in a video Thursday morning. Let's get right to Terry Moran.

This transcript has been automatically generated and may not be 100% accurate.

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