Over the past few years states have been experimenting with legal marijuana. Whether it be for medical or recreational purposes, the cannabis is crossing state borders. According to ABC Chicago, drug dealers have been using the mail system to deliver packages of marijuana to the doorsteps of their customers.

Antonio Gomez is a member of the U.S. Postal Inspection Service in Chicago. He said that these people are going through a lot of trouble to disguise the paraphernalia.

“Federal law trumps state law,” Gomez said. “So even with these states that have passed the legal recreational use of marijuana, it is still a violation of the federal law to transport illegal narcotics through the US mail.”

Gomez believes that the inspection service is only catching around 10 percent of illegal packages, meaning 90 percent are not intercepted. To read more about how drug dealers are abusing the mail system, check out the full story.