A former Georgetown University student accused of making ricin in his dorm room pleaded guilty Monday, and could face up to two years when he's sentenced.

According to court documents, 19-year-old Daniel Milzman, a freshman from Bethesda, Maryland, showed a student resident advisor a small bag of ricin last March. Several hours later, D.C. fire and police officials questioned Milzman, who admitted he had made the ricin.

He had shrugged when he was asked by the advisor whether he planned to use the ricin on a student he had a personal relationship with, and later told police he wanted to use it on himself.

Prosecutors said Milzman taunted the other student on Facebook, posting, "You would be more use to the world if you were chemically dismembered and your parts sold to a lab."

The amount of ricin Milzman produced was enough to kill an average person weighing 220 pounds if inhaled or injected, officials said. According to court documents, Milzman spent about a week researching ricin online, and watched 13 episodes of the show "Breaking Bad," during which ricin was used as a weapon to injure or kill someone.

When sentenced, Milzman faces between 366 days and two years behind bars.