How does Jill Valentine supposedly die in the Resident Evil series

she dose not die in the official re series aka 0,1,2,3 and cv but in the new ones i dno cause i gave up after 4 but somehow she died came back because of wesker and he died her hair blond (weskers fetish or something) and she works for him. i would stick to 0-cv their the best resident evils out their.

she doesn't actually die ... if you play re5 (which is actually the best one yet in terms of storyline and gameplay) chris flashes back to a previous mission he was on with her somewhere in russia. The umbrella chronicles actually delves into this T-A.L.O.S mission with these two, but doesn't cover what happens to Jill ... anyways ... in his flashback, chris is describing to his new partner, Sheva, how the two of them engaged superhuman wesker in hand to hand. wesker, of course, gets the upperhand and is about to do away with chris when Jill saves him by lunging at wesker, throwing him, and herself out of a window and over a cliff to their deaths. the flashback scene ends with chris yelling "JIIIILLLLL!!" out of the window. he then explains that niether wesker's, nor Jill's bodies were ever found and she was presumed dead.

the rest ... you'll have to play the game to see but it's not too hard to figure out what had happened.