An employee of the drug recovery center that Vice President Mike Pence abruptly withdrew from visiting agreed to plead guilty last week to federal drug trafficking charges.

At the time the Pence suddenly cancelled his visit, the White House refused to explain Pence’s absence, with President Trump describing the reason for the cancellation as “very interesting.”

Jeff Hatch, who is listed as the chief business development officer at Granite State Recovery Centers, is accused of moving 1,500 grams of fentanyl, an extremely potent synthetic opioid, from Massachusetts to New Hampshire, where he then handed some of it off to an alleged area drug dealer, according to a plea agreement.

Two people familiar with Pence’s cancellation said the reason for the sudden decision — which went unexplained for weeks — was a federal law enforcement investigation.

Read more at CNN.