A HELI PLT FAILS TO FULLY UNDERSTAND A TFR NOTAM; RESULTING IN A VIOLATION OF THE TFR.

Narrative

ON THE EVENING OF JUL/WED/04; A FRIEND FROM TRACON CALLED TO BRIEF US ON A GOV OFFICIAL COMING TO TOWN ON JUL/THU/04 AND IT SHOULD NOT AFFECT OUR OP UNLESS WE FLY N. (THIS SET ME UP FOR THE NEXT MORNING.) ON THE MORNING OF JUL/THU/04; WE CALLED FSS AND THEY FAXED A COPY OF THE NOTAM REGARDING THE GOV OFFICIAL. DURING OUR PRESHIFT BRIEFING; I WARNED OUR DISPATCHER AND FLT CREW THAT A GOV OFFICIAL WAS COMING INTO TOWN 'BUT IT WILL NOT AFFECT OUR OPS UNLESS WE HAVE A FLT UP N.' I THEN SCANNED THE NOTAM AND HIGHLIGHTED THE START TIME AND FINISH TIME AND THE PHONE NUMBER FOR DISPATCH TO CALL TO COORDINATE WITH TRACON AND SECRET SVC IF WE WENT N. AT XA49 HRS; POLICE DISPATCHER PHONED IN A REQUEST FOR OUR TEAM TO FLY TO A MULTIPLE VEHICLE ACCIDENT. I QUICKLY CHKED THE OFFICE COMPUTER LIVE RADAR TO CHK RECENT LCL STORM LOCATION AND MOVEMENT; AND WE LAUNCHED. ZZZ CTL TWR ADVISED ME OF MY DEV WHEN I CALLED THEM TO GET CLRNC TO ENTER THEIR CLASS D AIRSPACE TO LAND AT THE ACCIDENT SCENE. RE-READING THE NOTAM WHEN I RETURNED TO BASE; I SAW THAT THE ADIZ WAS A 25 NM RADIUS CIRCLE AROUND ZZZ3 ARPT FROM THE SURFACE UP. WE NEEDED TO BE ON A FLT PLAN TO FLY ANYWHERE UNDER THE ZZZ3 CLASS B VEIL.