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It wasn't immediately known if Cheatham has a lawyer.
Prosecutors say Cheatham was the boyfriend of Mariah's aunt.
http://abcnews.go.com/US/police-person-interest-detroit-girl-murder-case/story?id=14246402Dominique Poole, the child's aunt, told ABCNews.com she thought her sister's boyfriend, Darnell Cheatham was acting suspicious the day the 5-year-old vanished.
"I knew it had to be someone that was at the house that did it," Poole said.
Another one of the child's aunts and her boyfriend were already questioned by police earlier in the investigation, according to Poole. Several relatives had expressed anger with the two, Quanita Smith and Darnell Cheatham, because they claim they were not being truthful with police and allegedly failed a lie detector test administered by police.