A Georgetown University student who’s a big fan of Breaking Bad has been sentenced to one year and one day in prison for possessing ricin—a deadly poison that’s also a huge plot point on the AMC show.

According to a release from the office of U.S. Attorney Ron Machen, 20-year-old Daniel Milzman, who was arrested in March for possessing ricin in his dorm room, has been sentenced to one year and one day in prison for not registering the poison with federal authorities. Milzman originally pleaded guilty to possessing the deadly drug back in September.

On March 17, Milzman was arrested for possession of ricin by law enforcement officers. Prior to that, court documents say that he had “contacted a friend, a student Resident Advisor, and asked whether they could meet; subsequently, the two met in the friend’s dormitory room” where Milzman asked if they could have a “confidential” conversation in which he showed them the bag of ricin. He told them that he made the substance over a four-day period while on break from school.

The RA asked Milzman if he intended to use it on another student that he had a previous personal relationship with, and Milzman “simply shrugged.” According to authorities, Milzman said he planned to use the ricin on himself when he was asked by law enforcement officers.

Per his plea deal, Milzman has been given credit for the seven-and-a-half months he’s already served since he was arrested and he may be eligible to enter a half-way house in January. When he was first arrested, Milzman was facing a sentence of up to five years, but prosecutors and his defense lawyers agreed on a sentence between one and two years, with three years of supervised release.