An undercover officer for the Drug Enforcement Administration ends up in prison when the drug war becomes personal:

“‘A lot of people disappear in Mexico,’ he says. ‘They are buried where no one will find them. Some are eaten by tigers and some by sharks. There are also big tanks with acid in them.’ He pauses for a long time between the sentences.

“‘We didn’t manage to catch all the bad guys. In those cases, we gave the Mexicans their names and said, ‘Do what you need to do.’ The Mexicans made those people disappear.’

“Martinez sits in his car, holding the steering wheel firmly with both hands. He looks frightened by the memories of his own life. ‘Come on, let’s go to the cemetery,’ he says.”