LOS ANGELES (CBSLA.com) — A $20,000 reward was offered Wednesday for information that would lead to the arrest of the person who is responsible for raping a Loyola Marymount University student.

Around 12:40 a.m. on Nov. 1, 2014, a student was raped in a home, located in the 8700 block of Yorktown Avenue, during a Halloween party that was attended by LMU students and visitors, according to the Los Angeles Police Department.

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Detectives described the suspect as a Caucasian man in his early 20s who has brown shoulder-length hair, stands 6-feet-tall, and weighs 170 pounds. He was last seen wearing a white top hat, and a white shirt with dark pants.

It remains unclear if the suspect was an LMU student, however, officials have determined that he did not know the victim.

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The LAPD and LMU Department of Public Safety have released a sketch of the suspect as part of their extensive investigation.

Police explained additional information is needed to identify the person responsible for this crime.

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Anyone with information regarding this incident is urged to contact the LAPD Operations West Bureau Sex Crimes Unit at (213) 473-0447 or the LMU Department of Public Safety at (310) 338-1893.