That snake was a little over 7ft long and is not the record for the Eastern Diamondback rattlesnake. I wish I could have caught that one. It would have been at my house or the Jacksonville Zoo & Gardens. It was an impressive snake for sure. 8ft 3 inches is the Official record for the rattlesnake species and that was an Eastern Diamondback also. The Eastern and Western Diamondback, Mexican Green, Canebrake and Cascabel rattlesnakes have been recorded 6ft or larger. I have personally handled Easterns and Canebrakes over 6ft, but I have not seen a legitimate 9ft or larger rattlesnake. There maybe some but until we catch or kill one it's just he said she said. Most people exaggerate the size of snakes anyway. I have kept many different species of rattlesnakes and various other venomous snakes. My largest Diamondback was 5ft 2 inches and I had a Canebrake that measured 6ft 4 inches. That Canebrake was a big boy, I got him south in Georgia. The Diamondback was from Jacksonville. Anyway, 15ft or not that snake was a beauty and should have been caught and not killed.