He was the one to start the whole thing. He was the one to start Slayer.
He got together with Jeff at first. Then they met with Dave Lombardo, who they could use, because they were looking for a drummer.
In 1983, Kerry helped out Megadeth a few times, during concerts, because Megadeth had some problems with a guitarist.

One of Kerry's hobbies is breeding snakes and show-dogs.
It has even envolved into some sort of a business for him.
Kerry is a man who isn't afraid to open his mouth and sometimes that causes trouble.
He says what he wants to, completely. In 1995, he was the one to say, in an interview to Kerrang, that Kirk Hammet was the most overrated player ever to grace the pages of a guitar magazine.
Many readers couldn't deal with that, and Kerrang received tons of letters about that.
After that incident, the relationship between Metallica and Slayer has not been the best.

He was married in 1990 but was later divorced and he has a child also. He lives in Phoenix, (Arizona?).

Kerry King and Lars Ulrich, have been described as the most influencial persons in heavy/thrash metal. Because Kerry started Slayer and Lars Ulrich started Metallica. Those two bands, have influenced countless other bands. The entire thrash generation, was build on Show No Mercy and Kill'em all.

Kerry is a big fan of hockey and football. Usually he wears a sports shirt, when performing.
He also has a sister but I don't know her name.