Mexico Ousts 3,200 Police Officers From Force

Mexico fired nearly one-tenth of its entire Federal Police force en masse for failing lie-detector tests, being suspected of corruption, or for other reasons

Other reasons ?

I'm a little surprised it was not at least half the police force .

The Wall Street Journal
MEXICO CITY—Mexico fired nearly one-tenth of its entire Federal Police force en masse for failing lie-detector tests, being suspected of corruption, or for other reasons—a major blow to efforts to fight drug-trafficking gangs, officials said Monday.

The purge of about 3,200 officers, which was carried out over the past week, is a blow to a relatively new force that is spearheading the country's crackdown on organized crime and is supposed to have been a model for a new kind of Mexican police officer.

While critics said the firings, the biggest in years in Mexico, were a sign of persistent rot in one of Mexico's more reliable law-enforcement institutions, others saw it as evidence that the government of President Felipe Calderón is committed to rooting out corruption.