1.   By that time, American undercover agents had begun infiltrating drug trafficking networks by providing money pickup services for the dealers.

2.   The Mercury-News series alleged that this alliance created a drug trafficking network that was the first to introduce crack cocaine into South Central Los Angeles.

3.   According to an NCB case study, teachers who were involved in drug peddling normally employed a direct sales method to expand their trafficking networks in schools.

4.   But on occasion, investigators crack a sex trafficking network and glimpse the workings of sex smuggling.

5.   National police said Oubina directed a drug trafficking network moving illegal substances through the Galician coast for sale in Spain and the rest of Europe.

6.   Officials said Colombia and Spain are close to an accord to share information on drug trafficking networks.

7.   Then he went to the police station to reveal that he was a member of drug trafficking network.

8.   Those arrested included Juan Ramon Camacho and Rosario Uriarte, alleged to be kingpins of Los Angeles cells of the trafficking networks.

9.   Trafficking networks were disrupted when drug warlord Khun Sa turned himself in to the Burmese government in January, it said.

10.   Two suspects were killed last year in apparent feuds inside the trafficking network, authorities said.