Lawyers for a former Stanford student who sexually assaulted an unconscious woman outside a campus fraternity party have filed an appeal.

Lawyers for Brock Turner filed the appeal Friday. They argued the Ohio native's initial trial was "a detailed and lengthy set of lies."

The lawyers said they hope a new trial will help overturn Turner's mandatory lifetime requirement to register as a sex offender.

The case gained national attention when Judge Aaron Persky sentenced Turner to six months in jail.

NBC Bay Area reported that John Tompkins, Turner's legal adviser, said what happened wasn't a crime.

Turner was convicted of three felony counts of sexual assault. At the time of his case, he was a decorated swimmer at Stanford.