Transcript for Missing Wash. Boy: Hope Starts to Fade
Hope that it missing two year old boy in Washington State will be found alive is beginning to fade police there are moving forward their -- -- suspicions grow about the boy's mother. Here's ABC's Neal Karlinsky. Overnight Solomon metal -- met with reporters to plead for help finding his son who's now been missing. For nearly a week. My hope that he's coming back and best way I find. -- -- think he's gonna come back. He showed off the flyers he's planning to pass out and he remained suspicious of his wife Julia -- kolbe. Who claims she left two year old sky alone in her car after she ran out of gas and walked off for -- He had this to say about her earlier I do believe Julia has she is responsible police are increasingly skeptical of the mother is well. In this video you can see detectives -- late night test drive up her car. They're now convinced it. Didn't have the engine trouble and there was plenty of gas in the tank. I'll just let the evidence speak to itself which is. There was gas in the car the car was able to drive and operate that's not what would you you told us. Despite repeated attempts to reach the mother for help and to take a polygraph. Detectives say she hasn't responded. -- father is holding out hope. -- is still alive. It's my son I'm I'm gonna have hope. My strength is coming from my son who is missing thirteen little people. Police fear the search for sky -- wallet could remained stuck until his mother has more Tuesday. For Good Morning America Neal Karlinsky ABC news Bellevue Washington.
This transcript has been automatically generated and may not be 100% accurate.