offender for the rest of his life.

The local sheriff's office in Ohio said Turner would be treated "no differently than any other sex offender we monitor".

Image copyright Reuters Image caption Turner had been a champion swimmer at the prestigious Stanford University

The former swimmer's sentence prompted an outcry, with critics saying the judge had been overly lenient and sex assaults on US campuses were not being treated seriously enough.

Prosecutors had demanded a sentence of six years in state prison.

Judge Aaron Persky, who handed down the sentence, expressed concern about the impact of prison on Turner. In his decision, he said positive character references and Turner's remorse and lack of previous criminal record were mitigating factors.

Turner's father, Dan, also sparked outrage during the case, saying his son should not havebeen jailed for "20 minutes of action".

Victim's testimony

Two witnesses said they had seen him sexually assaulting the woman, who was lying on the ground unconscious.

The victim, referred to by the pseudonym Emily Doe, released her victim impact statement publicly. It was read by millions, and praised by US Vice President Joe Biden.

She criticised Turner for not admitting the crime and putting her and her family through an "invasive" and "aggressive" trial.

Later, she expressed disappointment at the "gentle" sentence her attacker received.

Image copyright Reuters Image caption California attorney general Kamala Harris was among those who criticised the sentence

California attorney general Kamala Harris added her voice to the criticism, questioning whether the facts "merit that kind of mitigation".

Protesters have called for the recall of Judge Persky, who last month asked