Police and volunteers continue to search for missing 4-year-old Carnel Chamberlain.
Carnel was last seen Thursday night at his home on the Saginaw Chippewa Indian Reservation in Mount Pleasant where he was staying with his mother's boyfriend.
Now TV5 has learned that Carnel's mother, 21-year-old Jaimee Chamberlain, had admitted to taking two polygraph tests in connection to her son's disappearance.
That information comes on the heels of Tribal police announcing two days ago that the boyfriend, Anthony Bennett, is a "person of interest." Police said they asked Bennett to take a polygraph test and he turned the request down.
On day six of the search for the boy, several police agencies, including the FBI, and volunteers searched areas that were first probed when the boy was reported missing Thursday night around 10 p.m. Crews were out probing areas on horseback and police K-9 units were also utilized.
To date, 38 agencies have helped search for the boy.
On Tuesday, authorities said their search was focusing on a wooded area near a wastewater treatment plant where sonar equipment and an ROV was deployed to search the waters. Police also combed an area near the boy's house.
The Morning Sun of Mount Pleasant reports Monday's searches were concentrated in wooded areas near the home. Also Monday, MLive.com reports a search warrant was executed related to the boyfriend. Details about the warrant weren't released.
For a detailed timeline of events, click this PDF file.
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