Puffy got Biggie killed, therefore I believe it. What I don't believe are all the spelling and grammar errors in that letter. WTF?
By the way, from that link you posted: " Quincy penned a letter to his father Al B. (when he was 17), but proclaimed Diddy as his real father and father figure." WTF x2. That is supremely evil. Sean Combs buys off the son of his beard with money, access and women. The only reason I can think of for publically proclaiming someone else as your real father is if your biological has abandoned you first, and/or molested you. Your stepfather having more money than your biological is not a reason to proclaim someone else your real father.
Kim Porter should rot in hell for allowing this situation to occur, even more than Sean Combs for encouraging it. How would she feel if Sean Combs pushed her out of her twin daughters lives and had them proclaiming Cassie's robotic ass -- or any one of his other rent-a-wombs -- as their real mother and mother figure?
This is just a sad story all the way around.