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NORRISTOWN, Pa. – Bill Cosby‘s sentencing hearing opened Monday with a debate over whether the 81-year-old comedian should be declared a “sexually violent predator” – a scarlet letter that would make him subject to mandatory lifetime counselling and community notification of his whereabouts.

Cosby, who faces up to 30 years in prison for drugging and molesting a Temple University women’s basketball administrator in 2004, fought the prosecution’s effort to classify him as a predator under state law.

Kristen Dudley, a Pennsylvania state board psychologist, testified that Cosby has an uncontrollable urge to violate young women and would probably commit another offence if given the chance. Dudley added that Cosby’s assault of Andrea Constand fits a long pattern of predatory behaviour by the former “Cosby Show” star.

READ MORE: Bill Cosby sentencing set to begin, could face 30 years in prison for sexual assault

Cosby often befriended women, then betrayed their trust by sedating them with drugs or alcohol and violating them for the “sole purpose of his sexual gratification,” Dudley testified.

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The defence argued that Cosby is unlikely to commit another crime because of his advanced age and health – he is legally blind and uses a cane – and because there have been no complaints that he molested anyone in the 14 years since his encounter with Constand.

Cosby’s lawyers argued, too, that the state law on classifying sexual predators is unconstitutional. Lawmakers in Pennsylvania and elsewhere have repeatedly rewritten their sex-offender reporting laws after courts found them vague and unfairly punitive.

WATCH: Andrea Constand speaks out for first time about Bill Cosby sexual assault

0:42 Andrea Constand speaks out for first time about Bill Cosby sexual assault Andrea Constand speaks out for first time about Bill Cosby sexual assault

Prosecutors told Judge Steven O’Neill the law is necessary for public safety, and the judge allowed the hearing on Cosby’s status to proceed.

The legal wrangling came at the start of a hearing that will determine how the comedian once known as America’s Dad will be punished for knocking Constand out with pills and assaulting her at his suburban Philadelphia home more than 14 years ago.

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The proceeding took place as another extraordinary #MeToo drama continued to unfold on Capitol Hill, where Supreme Court nominee Brett Kavanaugh faces allegations of sexual misconduct from more than three decades ago.

READ MORE: Bill Cosby’s sentencing marks a new milestone for the #MeToo movement

Cosby was the first celebrity to go to trial in the #MeToo era and could be the first to go to prison – perhaps for the rest of his days – after being convicted in April.

Cosby, looking grim, walked into the courthouse on the arm of his longtime spokesman as protesters shouted at him. Constand arrived a short time later.

At the end of a hearing that could last two days, the judge could sentence Cosby to as much as 30 years in prison or send him home on probation. The state guidelines for someone like Cosby, with no prior convictions, call for about one to four years behind bars.

WATCH: Cosby accusers say women should report assault

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“Obviously, the allegations are serious, and, except for his age and poor health, would normally warrant some jail time,” said Samuel Stretton, a veteran defence lawyer not connected to the case.

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In the years since Constand first went to police in 2005, more than 60 women have accused Cosby of sexual misconduct, though none of those claims have led to criminal charges. At least two of those women, Lise-Lotte Lublin and former model Janice Dickinson, were among those in the courtroom Monday.

Prosecutors had hoped to have some of the other accusers address the court at sentencing. But the district attorney’s office told The Associated Press on Monday that that would not happen.

READ MORE: Bill Cosby a ‘sexually violent predator,’ says Pennsylvania board

It remained unclear whether Constand or Cosby would speak at the sentencing.

A few hours before the hearing, Constand tweeted Ephesians 4:26, a Bible verse about letting go of anger: “Be wrathful, but do not sin; do not let the sun set while you are still angry; do not give the Devil an opportunity.”

WATCH: Gloria Allred says Bill Cosby should be sentenced to prison

1:29 Gloria Allred says Bill Cosby should be sentenced to prison Gloria Allred says Bill Cosby should be sentenced to prison

Cosby, who grew up in public housing in Philadelphia, became the first black actor to star in a prime-time TV show, “I Spy,” in 1965. He remained a Hollywood A-lister for much of the next half-century, hitting his peak in the 1980s with the top-rated “Cosby Show” as the warm, wisecracking dad, Dr. Cliff Huxtable.

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The AP does not typically identify people who say they are victims of sexual assault unless they come forward publicly, which Constand and other accusers have done.