PHILADELPHIA — Bill Cosby’s wife called Thursday for a criminal investigation into the suburban Philadelphia prosecutor behind his sexual assault conviction, saying the case that could put the 80-year-old comedian in prison for the rest of his life was “mob justice, not real justice” and a “tragedy.”

Camille Cosby made her first comments on the verdict in a three-page statement sent through a family spokesman even as institutions from Hollywood to Madison Avenue continued to wipe away the remnants of his legacy. He was expelled Thursday from the motion picture academy.

Camille Cosby compared her husband of 54 years, convicted a week ago on three counts of aggravated indecent assault, to Emmett Till and other blacks mistreated by the justice system.

“Once again, an innocent person has been found guilty based on an unthinking, unquestioning, unconstitutional frenzy propagated by the media and allowed to play out in a supposed court of law,” she said. “This is mob justice, not real justice.”

Camille Cosby, 74, said chief accuser Andrea Constand was a liar whose testimony about being drugged and molested at Cosby’s home in January 2004 was “riddled with innumerable, dishonest contradictions.”

She echoed her husband’s lawyers, who contended that Constand framed him to score a big payday.

Her statement did not address behavior Cosby has admitted to, such as philandering and contention that he was having a consensual affair with Constand.

Constand’s lawyer responded, “why would any reputable outlet publish that?”

“Twelve honorable jurors — peers of Cosby — have spoken,” lawyer Dolores Troiani said.