what type of turtle

by brett
(illinois)

he is kinda big with a yellow and black under shell he has webbed back feet clawed front feet and the top of his shell is mostly green with a little bit of brown i have 4 picture one of his head but he is in the shell mostly bc he dont like bein touched but he has a long neck and his head is dark green one of top of shell one of front foot and one of under his shell i think hes a painter turtle but im not for sure so plz P.S. is shell has a couple of white scuffs that arent supposed to be there help thx for lookin ;)