What is the difference between the use of "who" in the first half of the sentence and who in the second half?

Rebecca

Good question! The first "who" refers to which or what person, and can be read "the person that." The second "who" introduces a clause to give more information on a person. Ex: I don't know who told me the coffee shop is open on a Monday. = I don't know the person that told me the coffee shop is open on a Monday. Ex: I already know who the new president is. => gives more information