"Goonda Act will be invoked on Mustafa for raping the girl in Vibgyor High School because he has been involved in such cases in previous schools where he was employed," Siddaramaiah said in the state assembly.
31-year old Mustafa, hailing from Bihar, was arrested on Sunday after eight persons, detained for questioning in connection with the incident, were interrogated.
He said government has decided to amend the Goonda Act to include persons committing rape for the first time.
"We have sent the proposal to the Law Department and would introduce in the House as soon as possible," he added.
The government also plans to increase the number of fast-track courts to expedite cases and give speedy justice to the victim and their relatives, Siddaramaiah said.
On the demand made by YSV Datta (Janata Dal-Secular), Home Minister K J George said the government has instructed the police to examine some steamy scenes in Bollywood film "Hate Story 2".
Raising the issue, Datta said films such as "Hate Story 2" emboldens criminals to indulge in sexual assaults.
"I request the Home Minister and the Chief Minister to examine some steamy scenes in the film, which emboldens criminals to commit sexual crimes."
Image: The accused in the child rape case being produced in front of the media in Bangalore on Monday
Photograph: PTI