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DENVER -- Lawmakers took up five proposals in the Colorado Legislature on Monday that could have changed gun laws in the state. But after seven hours of hearings, all five bills failed.

The proposals were designed to remove some of the restrictions related to guns that have been passed in the past few years.

The process started Monday with emotional testimony that took place all afternoon and into the evening.

"There were 647 people in this state who died from gun violence," Eileen McCarron of Colorado Ceasefire told members of the House State, Veterans & Military Affairs Committee.

The bills would have removed permit and training requirements for conceal carry of handguns, allow them in all public schools and repeal high-capacity magazine restrictions passed during the 2013 legislative session.

"It is important that we stand firm that we will not see these bills repealed," Rep. Beth McCann, D-Denver, said.

Among those opposed to the changes were Tom Mauser, whose son, Daniel, died in the Columbine High School shootings.

"I think most reasonable people would say 'no.' They would have wanted their loved ones to have a chance of survival a chance at living," he said.

Like Jane Dougherty, whose sister was killed at Sandy Hook Elementary School in 2012.

"I was furious upon finding out that the troubled young man that killed my sister Mary and 25 other souls had easy access to an assault weapon," she said.

The changes proposed by a group of Republican lawmakers would have also allowed deadly force to be used against an intruder at a business.