PARKLAND, Florida: Joaquin “Guac” Oliver died in the 2018 Parkland, Florida, high school massacre, but federal lawmakers who oppose tighter gun regulations began getting phone calls in his voice on Feb 14, lambasting them for their position.

The families of Oliver and five others killed with guns are using artificial intelligence to create messages in their loved ones’ voices and robocalling them to senators and House members who support the National Rifle Association and oppose tougher gun laws. The protest is being run through The Shotline website, where visitors select which offices receive calls.

The campaign launched on Valentine’s Day because it’s the sixth anniversary of the Marjory Stoneman Douglas High School shooting, which left the 17-year-old Oliver, 13 other students and three staff members dead. Oliver was murdered as he lay wounded on the floor, the fatal bullet blasting through the hand he raised as the 19-year-old killer leveled his AR-15-style semiautomatic rifle.

Manuel and Patricia Oliver, Joaquin’s parents, say the campaign is based on the oft-cited idea that if someone wants laws changed, the first step is calling elected representatives. Immigrants from Venezuela who became US citizens, they want the sale of guns like the AR-15 banned.

“We come from a place where gun violence is a problem, but you will never see a 19-year-old with an AR-15 getting into a school and shooting people,” Manuel Oliver said. “There’s a reason for the gun violence in a Third World country. There’s no reason for the gun violence and the amount of victims in the United States.”