1)
What is "l'Ma'uzei Artzo"?
1.
Rashi: To return to his fortified city.
2)
Why does it say "v'Nafal v'Lo Yimatzei"?
1.
Malbim: He was returning to raise the tax that he was obligated to pay (refer to 11:18:3:2), and heard that there is a great fortune in one house of idolatry. He looted it; this greatly angered the people, and they killed him covertly. His place was not known.
