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Myerstown, Pennsylvania - A Pennsylvania couple accused of tying and weighting down a mattress on top of their toddler son's crib so he couldn't climb out have been charged in his suffocation death.

Lebanon County detectives say the Myerstown couple told them they weighted down the mattress with bagged rock salt and tied it down with bungee cords.

Detectives say the boy still tried to climb out and got his head above the crib's rail, but became trapped and suffocated by the weight of the mattress and rock salt.

Online court records don't list attorneys for the couple.

AP