Pain and Gain: The real-life story behind Miami's murderous Sun Gym gang

48 Hours Pain and Gain .chip { background-image: url('/fly/bundles/cbsnewscore/images/chip-bgd/chip-bgd-48-hours.jpg'); } By Troy Roberts Updated on: April 8, 2026 / 5:18 PM EDT / CBS News Add CBS News on Google Produced by Chuck Stevenson, Jamie Stolz, Tamara Weitzman and Alicia TejadaMIAMI -- Zsuzsanna Griga will never forget the kidnapping of her brother, Frank, and his girlfriend, Krisztina Furton in 1995."...he loved fast cars, beautiful girls and life," Griga said. "She was very beautiful. She was only 23 years old. My heart breaks when I think of what she went through."Felix Jimenez, now retired from the Metro-Dade Police homicide department, was the lead detective on the case. "Very handsome couple, they looked like they were made for each other," Jimenez explained. "Frank was the American success story -- an immigrant, came to this country with $10 dollars in his pocket and made millions."He came from Budapest, Hungary, and found a minimum wage job in New York City. Frank Griga and Krisztina Furton Zsuzsanna Griga "It was like a service station ... he was changing the oil, washing cars," Zsuzsanna Griga explained. "What he accomplished ... should make everyone proud because he went from nowhere to a millionaire on his own just by using his own resources." In fewer than 10 years, Frank was living in an upscale Miami enclave called "Golden Beach" and running a phone sex line empire. He was on top of the world until May 24, 1995."I started calling him and he wouldn't pick up the phone," Zsuzsanna Griga said. "I kind of knew that something really bad happened then..."The disappearance of Frank and Krisztina would become one of Miami's most notorious crimes. But who would want to kidnap them?"How did this all go down?" Roberts asked Jimenez. "So we got a call that there was a missing -- a wealthy couple that was missing out of Golden Beach," he explained. "That was a little strange because in homicide we need a crime scene. We need a dead body to respond to. The...