What are the ramifications of "Vehitzilu ha'Eidah"?
Rashi (Kesuvos, 15a): We learn from here the principle 'Safek Nefashos Lehakeil'. 1
If a Safek occurs in a Din concerning the death-sentence, Beis-Din rule leniently.
What is the connection between the Kohen Gadol and the Rotze'ach?
Rashi: It is not fitting that the Kohen Gadol, who comes to bring the Shechinah down into the midst of Yisrael
Which Kohen Gadol is the Pasuk referring to?
Ba'al ha'Turim: It is referring to a Kohen Gadol who was anointed with the Shemen ha'Mishchah, to one who became Kohen Gadol by wearing the eight garments and to one who stood in for the Kohen Gadol on Yom Kipur when he was Tamei and who stood down when he (the Kohen Gadol) returned. 1
Ba'al ha'Turim: That is why the Torah mentions 'Kohen Gadol' three times in the Parshah.
Is it really the Rotze'ach who anointed the Kohen Gadol?
Rashi #1: It is a 'short Pasuk', which is missing the word 'ha'Moshe'ach' (the one who anointed him).
Rashi #2 (citing Makos, 11b): Because if the Kohen Gadol dies and they appointed a replacement before the conclusion of the Rotze'ach's Mishpat in Beis-Din, he may only leave the Ir Miklat when the second Kohen Gadol dies (and the Pasuk is simply referring to the Kohen Gadol who was anointed in his time