BLOOMSBURG — A Columbia County inmate had to be taken to the emergency room at Geisinger-Bloomsburg Hospital after overdosing in his cell on an apparent mix of heroin and fentanyl, a criminal complaint says. Robert G. Killian, 35, of 355 Vine St., Berwick, was revived with a dose of Narcan after prison staff called for an ambulance. Killian had returned from a preliminary