Boermeester, who is two classes shy of graduation, was kicked out of school in July after a monthslong investigation by the school's Title IX office that concluded he caused physical harm to his girlfriend, USC women's tennis player Zoe Katz, in January.
Katz has vehemently denied the allegations. She sat with Boermeester in court Friday.
"I want to be very clear that I have never been abused, assaulted or otherwise mistreated by Matt," Katz said in a statement in July. "He is an incredible person, and I am and have been 100 percent behind him. Nothing happened that warranted an investigation, much less the unfair, biased and drawn-out process that we have been forced to endure quietly."
In USC's official response to the petition, it asserted that its investigation found Boermeester put his hands around the neck of Katz -- identifying her as Jane Roe -- "causing her to cough, and shoved her into a cinder block wall in the alley near her apartment at least twice" in the early hours of Jan. 21. It also said Katz's initial statement to investigators supported USC's findings.
"When I told the truth about Matt, in repeated interrogations, I was stereotyped and was told I must be a 'battered' woman, and that made me feel demeaned and absurdly profiled," Katz said. "I understand that domestic violence is a terrible problem, but in no way does that apply to Matt and me."
Boermeester was not arrested and is not the subject of a police investigation.
The university's version of events differs greatly from those outlined in the petition, which described the alleged incident as "loud, consensual horseplay and laughing in the alley." The petition says it was viewed, in part, by a USC student through a window. That student told his roommate what he believed to have seen, and his roommate told his father, USC men's tennis coach Peter Smith. Smith is required by law to report any allegations of abuse to school officials, and he fulfilled his obligation.
Boermeester, who kicked the game-winning field goal in USC's Rose Bowl victory in January, was suspended on Jan. 26, at which point he was banned from campus and banned from attending any university activities. Additionally, Boermeester was notified he was not permitted to have contact with Katz "directly or indirectly by any means."