Folt's statement to the USC community Friday said the individual was placed on interim suspension Tuesday, a day before the Sigma Nu chapter was also temporarily suspended.
A campus crime alert sent Wednesday by the USC Department of Public Safety brought broader awareness to a reported sexual assault and other reports of drugging at the Sigma Nu fraternity house.
"That alert referenced two separate incidents: a police report of sexual assault at a fraternity last weekend, and confidential information that drugs may have been placed into drinks without consent at a party last month at the same house, leading to possible drug-facilitated sexual assaults," Folt's statement said.
"Such behaviors are deeply disturbing, they hurt people and go against everything we stand for as a community," the statement said. "We are sorry for the pain and anguish this is causing."
USC said it has notified the Los Angeles Police Department.
In another development, LAPD identified USC Sigma Nu chapter President Ryan Schiffilea as a suspect in another reported sexual assault case that happened on Oct. 16. While he hasn't been arrested or charged, Schiffilea was questioned by detectives, according to the Los Angeles Times.
It is not clear if Schiffilea is the student who was suspended.
Due to the suspension, the Sigma Nu fraternity chapter is barred from hosting or organizing any activities. No parties or social gatherings will be allowed at the fraternity house.
The Interfraternity Council at USC issued a statement, saying in part: "We are disgusted this violence took place in our community. There is no place for this abhorrent misconduct nor a culture that supports it in the Interfraternity Council community at the University of Southern California or anywhere."