University of Maryland at College Park Police launched a criminal investigation of Delta Tau Delta fraternity members Thursday as details of alleged hazing incidents emerged in an Office of Fraternity and Sorority Life document, officials said.

The document, a copy of which was obtained by The Diamondback, details a six-week hazing program involving the forced consumption of alcohol and a vomit-inducing mix of liquids and mandated exercise, ending with multiple days in a closet called the “Cave.”

University Police Spokesman Paul Dillon said the department began its investigation after the university completed its own, which was jointly conducted by the Office of Student Conduct and OFSL, said Linda Clement, vice president for student affairs.

Dillon declined to comment on the ongoing investigation.

“I’m not going to discuss what steps we’ve taken,” Dillon said. He added that it’s “way too premature to discuss any charges.”

Hazing, which the university has repeatedly called “a fundamental violation of human dignity,” is illegal in the state of Maryland and is punishable by up to six months in jail, a $500 fine, or both.