Timothy Earl Hostetter was arrested overnight.
Police are still searching for Raymond Martinez.
Officials say the pair set off a fire alarm at the Wernersville Community Correction Center in Berks County Friday night.
They escaped during the ensuing confusion and made off in a waiting silver-colored minivan.
Documents show Hostetter was behind bars for theft.
Martinez arrested on burglary charges.
Anyone with information about Martinez is asked to call State Police.