21.   The suspected trafficker, Arturo Paez Martinez, was captured outside a shopping mall on Saturday afternoon by Mexican federal police agents, officials said.

22.   The witness said that police agents tipped off the assailants that other police officers were coming to arrest them.

23.   They and their families are followed by undercover police agents, and they dare not discuss campaign strategy on the telephone for fear that the lines are tapped.

24.   They likened security forces to corrupt police agents in pre-revolutionary Cuba, shaking down individuals, forcing sexual favors from women, and acting as pimps for prostitutes.

25.   U.S. government experts traveled to Mexico late last month to administer routine lie-detector tests to dozens of police agents.

26.   Violence erupted again on Saturday in the troubled state of Guerrero when seven police agents were killed and three others were wounded in an ambush on a rural road.

27.   When a mid-level trafficker named Hector Luis Palma was captured by army troops in Guadalajara last month, federal police agents were accused of protecting him.

28.   Others beat up a man they accused of being a police agent.

29.   Pedret said he had been told that police undercover agents threw rocks through store windows and then arrested protesters.

30.   Police agent David Tompsett said improper handling of evidence by Filipino investigators sometimes results in it being damaged before court trials begin.