Tell me please.

I'm pretty sure it died.

DAT clan (That clan) died on July 11, 2011....

why did it die?? its a good clan anyway

It died because most of their prominent members became inactive.

A nice example for what happens when you forget about forum.

ohhhh so that's what it is.too bad that it died i hope it revived again and anothjer question is it the best clanand who is the leader of the DAT clan

no dat istn the best clan it exist no "best" clan ... every clan is in a other mode good (i mean multiplayer or singleplayer etc.)
if you want to know who the leader of dat is just look at the memberlist on their forum .. the link to hit hasVirtue posted

hmm i think that shiva is the leader of DAT

they died due to inactivity

To answer your question about DAT's Leader the answer's Coke.
Also they disbanded because of inactivity.