Bill Cosby made female TV staffers feel uncomfortable - Sam Rubin

An American journalist who's interviewed Bill Cosby many times says the comedian used to make his female colleagues feel uncomfortable.

Cosby has been found guilty on three counts of sexual assault, and now faces up to 30 years in prison.

The former star of The Cosby Show in the 1980s and early 1990s was found guilty overnight (NZT) of drugging and molesting Andrea Costand at his home in 2004.

Cosby claimed the encounter with Ms Costand was consensual.

US Entertainment Correspondent Sam Rubin told The AM Show that he had women co-workers who noticed something odd about the now-80-year-old.

"We have several female staffers here who sort of dreaded his visits because - initially for their moms or relatives, they would pose for the picture but he would always keep his arm around them - on their shoulder or their side - for too long.

"And they sensed something that I think as men we didn't sense at all."

Mr Rubin has interviewed Cosby dozens of times over the years and says his fall from the top of the entertainment world is shocking.

"One of the most loved and trusted figures in America turns out to be - at least according to this jury - a perpetrator of criminal sexual assault."

Mr Rubin says that "both the truth and the time caught up with Bill Cosby", meaning the Me Too movement.

"The fact that people's sensibilities and sensitivities have certainly changed rather dramatically in the last year and a half - and the jury agreed.

"This woman had been paid millions of dollars by Bill Cosby to keep quiet. Ultimately the authorities said no, this is a case worth prosecuting."

The first trial ended in a hung jury because no other victims were allowed to testify.

"This time five other victims testified - and that was enough," Mr Rubin said.

He recalls interviewing Cosby once in his prime, when the star had more than a dozen big commercial endorsement contracts.

"I remember having a conversation with him - on camera - saying, boy... how many of these do you need? Isn't this enough? And he very pointedly said 'how much money do YOU make? Is it enough? And why would you preclude my ability to make as much money as I possibly, possibly can?'"

Cosby's lawyers say they will appeal the case.