Ah yes... Sand Tigers... We used to have two of them in the SC Aquarium in Charleston. Very ominous-looking, for sure, even though they're not known as man-eaters.
They were on display there because that tank was a "local" tank - meaning that yes, we do have Sand Tigers in our local waters.
However, I have never seen one in the wild - in fact, I've only seen a handful of sharks in the wild, and none of them locally.
...Excepting nurses, which lazily sit at the bottom of the wreck and sometimes snuggle with you.
I have known at least two instances in the past five years where a Tiger (not a Sand Tiger) was caught in the middle of our two local sounds - not 1/2 mile away from a popular beach. Both of these were in the 11-foot range, around 600 lbs. One was a pregnant female.
Also, last year there was a news article from two fishermen who reportedly were fishing a mile or two offshore Charleston (about 40 miles north of here) and encountered a shark larger than their 20' boat. Supposedly, one of the fishermen knew his fishes, and identified it as a Great White - which would be very interesting if true - this isn't the area for Great White sharks.
I also have heard from several fishermen that there's a lone, large hammerhead who makes one of our local wrecks his home.
...But I have never seen anything that exciting on any of my local dives.
For shark diving, I had to hit the Bahamas.