這句的意思妳可以這樣理解：
when the price is high（當價碼夠高，意即收受的好處足夠多時）
the former hang them high prosecutor (之前恨不得把犯人判死刑的公訴人；愛酷翻譯成嫉惡如仇也可以，算是意譯)
is not above defending the wicked （也會為壞人辯護。這裏Not above doing sth指“不會高尚到不去做sth”）
hang them high這裏的確是用來形容prosecutor的
這句的意思妳可以這樣理解：
when the price is high（當價碼夠高，意即收受的好處足夠多時）
the former hang them high prosecutor (之前恨不得把犯人判死刑的公訴人；愛酷翻譯成嫉惡如仇也可以，算是意譯)
is not above defending the wicked （也會為壞人辯護。這裏Not above doing sth指“不會高尚到不去做sth”）
hang them high這裏的確是用來形容prosecutor的