Having already said "u'Shefat'tem Tzedek" (See Sifsei Chachamim), why did Moshe add "Lo Sakiru Panim ba'Mishpat"?
Rashi: Moshe is talking here, not to the judges, but to those who appoint them - prohibiting them from basing their appointment on the candidate's looks or strength or on the fact that he is his relative, even though he is not an expert in law. 1
Rashi: And if such a judge obligates one who should be exempt, or vice-versa, the Torah places the blame on the one who appointed him.
What are the ramifications of "ka'Katon ka'Gadol Tishma'un"?
Rashi #1: The judge must treat a small case of a Prutah with the same seriousness as one of a hundred Manah - inasmuch as, if it appears in court first, it should be given precedence, and not pushed off till last.
Rashi #2 (citing Targum Onkelos): The judge must treat the two litigants equally, irrespective of financial status - He may not vindicate the poor man so that he should be sustained honorably. Nor may he vindicate a rich man who owes a pittance,to protect his dignity, and after he leaves the courtroom, tell him 'Really, you owe him
What is the translation of "Lo Saguru Mipnei Ish"?
Rashi #1: It means that the judges should not be afraid of anyone 1 (of a rich man or a ruler - Targum Yonasan).
Rashi #2: 'Do not gather in (hold back) 2 your words.
What are the connotations of "Ki ha'Mishpat l'Eilokim Hu"?
Rashi #1: If a judge takes away money from someone unjustly, he forces Hashem to pay him back - thereby placing a lawsuit on Hashem's Shoulders (Kevayachol).
Rashi #2: Sanhedrin, 56b): It is a reason for the judges not to be afraid of anyone other than Hashem.
Ramban: It is in front of Hashem that the Beis-Din adjudicates and in His place. 1 Consequently, if they fear litigants or judge corruptly, they will have sinned against Hashem, since they aborted His Shelichus.
Targum Yonasan: The Dayanim must judge truthfully, becsause justice takes place before Hashem, before Whom all hidden things are revealed. 2