NMAC BTWN 2 ACR PART 121 COMMUTERS.

Narrative

BRADLEY CTLR VECTORED INTRUDER ACFT INTO OUR PATH OF FLT (V-167 WBOUND). BECAUSE OF MARGINAL VISIBILITY; TCASII WAS THE FIRST WARNING OF A CONFLICT AT APPROX 5 MI. I INSTRUCTED THE FO TO GET READY TO DISCONNECT THE AUTOPLT. AT APPROX 2 MI WE RECEIVED AN RA TO CLB. I DID NOT SIGHT THE INTRUDER ACFT UNTIL IT HAD PASSED BEHIND US. IT HAD BEEN AT 6000 FT AND RECEIVED AN RA TO DSND. I TRY TO KEEP A PICTURE OF WHAT THE ACFT AROUND ME HAVE BEEN INSTRUCTED TO DO. IN THIS INCIDENT THE INTRUDER ACFT HAD INITIALLY BEEN AHEAD OF US ON THE AIRWAY. FOR WHATEVER REASONS THE CTLR ELECTED TO VECTOR THE ACFT OFF THE AIRWAY TO LET US PASS. SHE THEN FORGOT TO TURN US TO THE NEXT AIRWAY (SEE DIAGRAM) AND TURNED THE INTRUDER TACK INTO OUR PATH. I SHOULD HAVE PICKED UP ON THIS SOONER BUT DID NOT. TCASII ONCE AGAIN PROVED ITS VALUE IN PREVENTING POSSIBLE MID- AIR COLLISION. NOTE: I BELIEVE CTLR HAD INTENDED TO VECTOR US TO V-1 AND BECAME DISTRACTED BY OTHER RESPONSIBILITIES. OUR CLRNC (V-167 HFD; V-1 MAD) LED US INTO A CONFLICT WITH ACFT #2 BEING VECTORED BACK AT HFD.