Thomas Cunningham
Thomas Cunningham (Boulder County Sheriff's Office)

Arraignments for the the two University of Colorado students accused of sickening a professor and seven classmates with pot-infused brownies in December were delayed at a hearing in Boulder District Court Friday morning.

Thomas Riccardo Cunningham, 21, and Mary Elizabeth Essa, 19, are now scheduled for arraignment on 18 felony charges each on March 1. Both of them are free on $5,000 bond and are out of state. Their respective lawyers entered appearances on their behalf after Cunningham and Essa had their appearances Friday waived by Judge Roxanne Bailin.

According to police and court records, Cunningham and Essa brought marijuana-laced brownies to their history class as part of "bring food day," but did not tell anyone else in the class that the brownies were laced with THC, the active ingredient in marijuana.

Mary Essa
Mary Essa (Boulder County Sheriff's Office)

Later that day, assistant professor Celine Dauverd and several students complained of symptoms including dizziness, anxiety and loss of consciousness. Dauverd and two students were hospitalized after ingesting the brownies.

CU police said both Cunningham and Essa subsequently admitted the brownies contained marijuana.

Both were charged with with eight counts of second-degree assault and eight counts of inducing the consumption of a controlled substance. The also face one count each of conspiracy to commit second-degree assault and conspiracy to induce consumption of a controlled substance because they are alleged to have worked together.

Each of the second-degree assault charges, Class 4 felonies, carries a possible prison sentence of two to six years, while the inducing consumption of a controlled substance charges and the conspiracy charges, all Class 5 felonies, carry possible prison sentences of one to three years each.