Where can I find facts about Malcolm X ?

One thing you have to remember, is that anyone as famous
as Malcolm X will have any number of things written about them, and some are more true
than others, but you should be sure to check the nature of your sources as you search. 
If you search online, there are a huge variety of websites and a long entry on wikipedia
among other places.  If you go to print resources you will likely find more reliable
types of information, but you can also find a listing of his speeches and be able to
listen to him and make some decisions for yourself about his agenda, his thoughts, and
his character.