DHC6 PLT MADE A VFR FLT PLAN FLT FROM S OF BUF TO FKR FOR REFUELING FOR DEST OF ELOY; AZ. WHILE DURING REFUELING AT FKR; HE WAS DETAINED BY THE LOCAL AND NATIONAL LAW ENFORCEMENT OFFICERS FOR WHAT APPEARED TO BE ERRATIC MANEUVERS OVER BUF CITY AS WITNESSED BY MIL ACFT MAKING A SECURITY CHK.

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I DEPARTED NEWFARE/HOLLANDS FIELD; NY; FOR ELOY; AZ. MY ROUTE OF FLT WOULD TAKE ME STRAIGHT S AND JUST E OF BUFFALO INTL ARPT. I DEPARTED JUST VFR AND THERE WAS A BROKEN CLOUD LAYER AROUND 8000 FT. BECAUSE FLT OVER INTERNATIONAL WATERS WAS PROHIBITED; VFR FLT ON A DIRECT COURSE TO ELOY; AZ; WAS OUT OF THE QUESTION. SO MY ROUTE OF FLT CONSISTED OF A CLB TO 12500 DIRECT TO BUF VOR AND THEN A R TURN WBOUND DIRECT TO CANTON; OH; THEN DIRECT TO MY DEST FRANKFURT; IN. I CHOSE THIS ROUTE BECAUSE IT WOULD KEEP ME E AND S OF LAKE ERIE AND IN TURN CLR OF CANADIAN AIRSPACE. ALSO; BEFORE I LEFT ON MY FLT I CONTACTED FSS ON THE GND TO GET ESSENTIAL WX AND RESTRS FOR THE FLT. I WAS INFORMED OF VARIOUS WX PATTERNS IN THE OH AREA AND FLT RESTRS IN FOREIGN AIRSPACE AND NEW CLASS B AIRSPACE RESTRS; I WAS NOT INFORMED ABOUT ANY SPECIAL RESTRS OVER BUFFALO A CLASS C ARPT; SO MY ROUTE OF FLT OVER THE BUFFALO AREA SHOULD HAVE BEEN NON-EVENTFUL. LATER AS MY FLT WAS IN PROGRESS I HAD TO MAKE ALTITUDE AND SMALL DIRECTIONAL CHANGES TO AVOID CLOUDS AND ENSURE VFR SEPARATION. AFTER MY FLT CONCLUDED TO FKR; I WAS RECEIVING FUEL TO CONTINUE ON MY NEXT LEG TO AZ. AT THIS POINT MANY POLICE OFFICERS ARRIVED AND LATER DETAINED ME AND SEARCHED MY ACFT. I WAS THEN TAKEN TO THE DETECTIVES OFFICE AND QUESTIONED ABOUT MY FLT. THEN I WAS TOLD; THAT I HAD BEEN INTERCEPTED AND FOLLOWED BY TWO F16'S. THEY CLAIMED THAT THIS ACTION WAS TAKEN; BECAUSE I WAS RPTED MAKING DRASTIC MANEUVERS OVER THE CITY OF BUFFALO. THE DETECTIVE READ ME MY RIGHTS; PHOTOGRAPHED MYSELF AND THE ACFT. WE CONTINUED TO HAVE A RECORDED CONVERSATION (PER THE REQUEST OF THE FBI). BUT AFTER THE QUESTIONING THE OFFICER RETURNED A PHONE CALL TO THE FBI AND THEY SAID TO RELEASE ME. I WAS THEN TAKEN BACK TO THE ARPT AND RELEASED TO CONTINUE ON MY WAY HOME. I DIDN'T RECEIVE ANY PAPERS OF ANY KIND; I WAS JUST LET GO. I'M NOT REAL SURE WHAT I DID WRONG. MY INTENTIONS OVER BUFFALO ON THIS FLT WERE TO MAKE A COURSE/DIRECTION CHANGE TO CONTINUE WBOUND TO AZ; I WAS SQUAWKING 1200 A VFR SQUAWK AND WAS ALSO FLYING A VFR ALTITUDE (12500 FT). I WAS TALKING TO ATC; BUT I WAS MONITORING THE CTR FREQS AS MY FLT PROGRESSED. SORRY I INCONVENIENCED THE US GOVT AND ALL THE OTHER CTLRING AGENCY'S OVER THIS MIX UP. I UNDERSTAND ALL THE ACTIONS THAT NEED TO BE TAKEN AFTER THE WRONGFUL ATTACK ON NY.