Whoever vs whomever
totally--not--me
I'd like to prefix that I am american but just a little stupid. I know that whoever works as subject and whomever as object but I'm currently watching the rookie and a sentence said in it threw me off
"It seemed likely that whomever sent that text killed Dim"
Shouldn't it be whoever? Like "whoever" sent that text is the subject performing the action or am I missing something here?