The prosecutor's interest in the prosecution is to win, and for the unscrupulous, unethical prosecutor to win regardless of the guilt or innocence of the accused. The prosecutor's career path could be injured by failing to win, showing the lack of skill as a prosecutor for a lost criminal case, or poor professional judgment in obtaining an indictment which later was dismissed. The prosecutor's career path is enhanced by being, and being known as the "winner", which enables the prosecutor to get more visible cases, and to obtain higher position and compensation in the prosecutor's office. Also, the career path for the successful prosecutor, as we have seen from the past, can go right up to the White House or to the position as Attorney General or as a federal judge at any of the 3 levels (District Court, Circuit Court of Appeals and the Supreme Court).
The loss of a criminal case once commenced through obtaining an indictment can cause a major reversal in a prosecutor's planned career, and with such pressure to succeed, what difference (the prosecutor argues to himself) does it make if the prosecutor cuts a few corners here and there. The defendant is probably guilty, of something, if not the crime for which he/she has been indicted.
In an economy which is becoming more concentrated, with big business and government becoming larger all the time, the economic opportunities for the prosecutor may appear to be dwindling in the private sector, whereas with government growth his/her prospects are steadily increasing, as long as the prosecutor wins.
A prosecutor wants publicity, and so do the prosecutor's superiors and political masters. If one of the major news media target someone for criminal prosecution, the prosecutor's