A lawyer for Sarah Mouhanna, 19, has not disclosed the basis for her defence against charges of displaying the flag of the proscribed terrorist organisation.
A number of lawmakers have denounced discrimination against Jewish students at Columbia University due to an ongoing anti-Israel solidarity assembly on campus.
Loay Alnaji, 50, was charged with one count of involuntary manslaughter and one count of battery causing serious bodily injury, with a special allegation added.