Municipal police in the states of Guerrero, Tamaulipas, Jalisco and Michoacan would be placed under state control quickly, because "these are the states most urgently in need of attention," according to the bill submitted late Monday.
In September, a drug cartel-infiltrated municipal police force in the Guerrero state city of Iguala detained 43 students and turned them over to the gang, which reportedly killed them.
The city's mayor and many of his police officers have been arrested. In the northern border state of Tamaulipas, many municipal police forces have already been effectively dissolved, because they were unable to face up to warring drug cartels or had been coopted by them.
However, analysts and experts warned that state police are not always more trustworthy than city or town cops.
According to a report by the Common Cause civic group, more state police (20,521) have failed background or vetting tests than municipal police (18,177) in recent years.
Analyst Alejandro Hope said that state police forces "with a few exceptions, are deformed institutions, deeply vulnerable to corruption and intimidation." In a column in the El Universal newspaper, Hope wrote that most state forces are relatively small, and only five have internal affairs offices to investigate misconduct by their officers.
The state with the most effective record in creating a new statewide police force, the northern border state of Nuevo Leon, had to recruit out of state to find clean, qualified, willing candidates, and pay them well, at more than USD 1,000 per month. The state even provided housing in special, secure housing developments.
Nuevo Leon Gov Rodrigo Medina noted he had to raise taxes to fund his security reforms, something that can be done in a relatively wealthy industrial state like Nuevo Leon, but would be hard in some poorer, southern states.
"It requires a financial capacity that most state governments don't have," said analyst Mentor Tijerina, in a column in the Reforma newspaper.
The proposal submitted to the Senate by President Enrique Pena Nieto must be approved by both houses of Congress and a majority of state legislatures.
