ACFT TARGET GOES INTO COAST STATUS CAUSING CTLR TO FORGET ACFT; THEN DSND ANOTHER ACFT TO SAME ALT LTSS.

Narrative

ACFT A WAS INBOUND FROM THE N TO DAB. I DSNDED HIM TO 70 DUE TO FTC AT 60. ACFT B WAS ENRTE NBOUND AT 70. ACFT B WENT INTO COAST WHEN HE FLEW OVER DAB - I TURNED ACFT A ON A 070 HDG (OVER OMN) VECTORS FOR DSCNT. ACFT B REACQUIRED 2 MI N OF DAB. ACFT A RPTED TFC OFF HIS FRONT. I CONCURRED AND TOLD ACFT A TO DSND TO 60. I THEN CALLED TFC TO ACFT B WHO ALSO CONCURRED. THERE WAS NO NEED FOR ADDITIONAL TURNS AS ACFT A WAS ALREADY ESTABLISHED IN A TURN AND HDG AWAY FROM ACFT B. I HAD FORGOTTEN ABOUT ACFT B WHEN HE DROPPED OFF THE SCOPE. THE CONFLICT ALERT DIDNþT HAVE TIME TO GO OFF BY THE TIME ACFT B REACQUIRED. SUPPLEMENTAL INFO FROM ACN 199856: WE WERE ACR A RDU TO DAB. OUR CLRNC WAS FROM OMN TO DAB AND WE WERE DSNDING TO OUR ASSIGNED ALT OF 7000 FT DSNDING THROUGH 8000 FT TCASII INDICATED AN ACFT AHEAD LESS THAN 1000 FT BELOW US. I VISUALLY PICKED UP THE ACFT ABOUT 2-3 MILS IN FRONT OF US AND ASKED THE CTLR ABOUT IT. SHE RESPONDED THAT THE TFC WAS NBOUND AT 7000 FT. WE STARTED A L TURN AND THE CAPT LEVELED THE ACFT AT ABOUT 7500 FT. THE OTHER ACFT PASSED APPROX 500 FT BELOW US AND 1/2 MI TO THE R. APPARENTLY THE CTLR HAD CLRED US TO THE SAME ALT AS THE NBOUND ACFT WITHOUT GIVING US A VECTOR TO THE E TO SET UP FOR OUR APCH TO RWY 25 AT DAB.