TALLAHASSEE, Fla. -- Richard Martinez's son Christopher was one of the seven victims killed in the University of California at Santa Barbara mass shooting on May 23.
"My son goes to college and he's dead," Martinez said.
Now in his son's honor, he's speaking out against gun violence. He joined Moms Demand Action for Gun Sense in America at the Capitol on Wednesday and delivered 20,000 postcards to Gov. Rick Scott.
"Eighty-six Americans die every day from gun violence in this country and there's a refusal of our political leaders to even discuss the issue," he said.
The group included Erica Lafferty, whose mother, Dawn, was the principal killed in the Sandy Hook Elementary School shooting in Connecticut.
"I promised myself that I wouldn't let her be part of a statistic," she said.
They are on a mission to deliver these Not One More postcards across the country, asking for stricter laws on background checks for gun purchases and for lawmakers to look into the issue of mental illness.
The group delivering the postcards isn't against the Second Amendment, but just hopes everyone with a gun is being responsible.
"Florida has the most concealed carry licensees of any state and we have one of the lowest violent crime rates," said Sean Caranna, executive director for Florida Carry, a gun-rights group.
The relatives of people killed in shooting sprees want tougher gun laws.
He says the issue should not be with people and not the guns themselves.
"The focus really needs to be on the criminal, not the tools that they use."
Martinez is calling on Americans to pledge to vote for lawmakers who will fight for laws to reduce gun violence.
"You send your kid to college you don't expect them to get shot to death," he said.