A search is under way Wednesday for an inmate who apparently escaped from the jail in Middlesex County.Officials say 20-year-old Timothy Petties was not at the Middlesex County Adult Correctional Facility for a head count Tuesday. Petties has been at the jail for a month as he awaits a trial on charges of resisting arrest and aggravated assault.According to officials, there were no signs of a breakout. A search was conducted throughout the day at the jail, but officials found no sign of him.