MUSIC: Did Dave Mustaine From Megadeth Invent Death Metal Vocals?

Is Megadeth - "Killing Is My Business" the origins of Death Metal metal vocals?

Not only is Dave Mustaine the top Heavy Metal lead guitarist and ex member of Metallica on the song "Killing Is My Business" at the end the song Dave does his metal growl which sounds exactly like later Death Metal vocals from other bands, is this one of the original influences of Death Metal vocals?

Obviously, since this record is one of the first Thrash Metal albums you have to give Dave Mustaine credit for inventing that and influencing Death Metal vocals, even if not the first he would be the most influential since he is the most well known artist, even over all of Death Metal today.

-END-