Four University of North Dakota students have been charged in a synthetic drug ring that led to the overdose deaths of two teens.
Casey Rosen, Peter Hoistad, Allyson Desantos and Steven Bucher were charged Tuesday in federal court with conspiracy to distribute controlled substances resulting in serious bodily injury and death.
All four pleaded not guilty. Trial is scheduled Nov. 6.
The latest charges are part of a wide-ranging case that spans local, state and federal jurisdictions.
Authorities say the hallucinogens caused the overdose deaths of 18-year-old Christian Bjerk, of Grand Forks, and 17-year-old Elijah Stai, of Park Rapids, Minn.
Andrew Spofford is accused of leading the conspiracy. He allegedly manufactured the drugs by mixing chemicals ordered through the mail.
At least four other people face charges.