At law-enforcement conferences and meetings, Muth teaches Interpol 101. He explains the color-coded system: Red seeks the arrest and extradition of a suspect; blue seeks information about someone, such as their identity, whereabouts, or ties to a crime; green warns countries about career criminals who travel internationally; yellow helps locate missing persons; and black seeks help identifying a corpse.
Muth tells the story of a New Jersey man who disappeared with his two daughters on Take Our Daughters to Work Day and jumped on a plane to London. His wife immediately contacted the local authorities, who contacted Interpol, which contacted British authorities, who were waiting at the airport when the plane landed. "We got a nice ending that time, all because the local cop knew about us," Muth says.
He urges officers to think globally in their investigations and to get information on fugitives in the system as early as possible. "You don't catch people unless they're in the database," says Muth. It's not unusual for officers to ask how to become an Interpol agent. "You already are," he tells them.