The film "Dogani," whose English title is "The Crucible," is based on the shocking true story of teachers at a school in the southwestern city of Gwangju for the disabled committing repeated sex crimes against hearing-impaired students for five years from 2000.

President Lee Myung-bak has recently called for measures to prevent such a crime from happening again after watching the movie.

The lawmakers submitted the request for a parliamentary probe to the National Assembly to look into the case and to come up with measures to prevent a recurrence of similar crimes.

"We need to thoroughly get to the bottom of the case," said Lee Jae-sun, a lawmaker of the minor opposition Liberty Forward Party, who initiated the request for the probe along with his fellow lawmakers. Some 80 lawmakers joined the campaign.

The looming parliamentary probe comes amid growing public calls for repealing the statute of limitations for child sex offenders.

Police have said law enforcement authorities cannot take legal actions against the suspects involved in the case as the statute of limitations had expired.

Six teachers were charged at that time, but only two received actual jail terms, each less than a year, with the others getting suspended terms and acquitted of charges.

A child foundation has collected signatures from some 300,000 citizens in a public campaign to try to repeal the statute of limitations for child sex offenders. The foundation plans to deliver the petition to the National Assembly later Wednesday.

A bill aimed at repealing the statute of limitations for child sex offenders has been gathering dust in the National Assembly for more than a year.