not so. i guess you just randomly said that with nothing backing it up. i suppose you have never heard of jeff meldrum or grover krantz? there have been hundreds of footprint casts, even blood samples and more. there has been a lot of research as to whether bigfoot does exists, and there is a good possibility such a creature does.
why haven't they found a dead one? "bigfoots" inhabit ranges where people extremely rarely ever go to, and if there's a dead body, the chance of locating one are nil.
check out a book called "sasquatch legend meets science" by jeff meldrum peoples.