WASHINGTON (AP) — More than 240 inmates have slipped away from federal custody in the past three years while traveling to halfway houses, including several who committed bank robberies and a carjacking while on the lam, according to documents obtained by The Associated Press. The federal Bureau of Prisons each year permits thousands of inmates it considers low risk to serve the final months of their sentences at halfway houses where counseling, job placement and other services are offered. [...] the data nonetheless expose lingering imperfections in a system that's come under scrutiny from the Justice Department's watchdog and which relies on trust that inmates nearing the end of their sentences will arrive at their destinations as scheduled. "The real issue is whether you've made the right judgment about who to trust and who not to trust being unaccompanied in a situation like that," said Republican Rep.