A Cobb County man will spend the rest of his life behind bars for sexually assaulting a teenager with special needs.

A trial jury on Friday convicted Johnny Pennamon, 66, on charges of rape, aggravated sodomy and sexual battery following a week-long trial.

Pennamon was sentenced by Cobb County Senior Superior Court Judge G. Grant Brantley to serve three consecutive life sentences, the Cobb County District Attorney’s Office said.

Assistant District Attorney Courtney Veal, who prosecuted the case, said Pennamon preyed upon the girl because he thought he “could easily exploit her due to her cognitive delays” and that she would never reveal the abuse.

“Because of her bravery, he has been held accountable and will never again have the opportunity to prey on or harm another innocent child,” Veal said.

Cobb County police arrested Pennamon in September 2015 after he was discovered trying to enter the child’s bedroom window in the middle of the night. During a therapy session, she said Pennamon repeatedly assaulted her throughout 2015.

Attorney Kevin Rodgers represented Pennamon, who has been in jail since his arrest.

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