A polygamous sect leader already serving a 50-year prison sentence in the US has been convicted of child abuse after girls were found in an unventilated trailer he was hauling through Arizona.

A polygamous sect leader has been convicted on child abuse charges in Arizona while already serving a 50-year sentence in federal prison for orchestrating sex involving children.

A polygamous sect leader has been convicted on child abuse charges in Arizona while already serving a 50-year sentence in federal prison for orchestrating sex involving children