Jeffery Brewer, 41, was arrested late Friday night.
According to a statement from the UCLA Police Department, he entered the room at Saxon Residential Suites in the 300 block of De Neve Drive at about 2:40 a.m. Friday, where he allegedly sexually assaulted the woman while she was in bed.
Brewer then left the room in an unknown direction. The woman was "medically treated on scene," according to the statement.
"Detectives quickly developed leads, and after a day-long search, police officers located and apprehended the suspect at around 9:45 p.m.," read the statement. "The victim and two witnesses positively identified the suspect."
Brewer was arrested for assault with intent to commit a felony, false imprisonment, burglary, and forcible sexual penetration, campus police said.
He's currently being held at the Los Angeles Sheriff's Department Inmate Reception Center where his bail is set at more than $1 million. Eyewitness News learned campus police arrested Brewer in July 2023 for a misdemeanor, according to inmate records.
Anyone with information about the case is urged to call the UCLA Police Department at (310) 825-1491 or the Anonymous Tip Hotline at (310) 794- 5824.
City News Service contributed to this report.