They finally got the answers they were looking for
Patty and David Stallings

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Patty Stallings took her ill three-month-old baby Ryan to the hospital on July 9, 1989 due to labored breathing and severe vomiting. The doctor concluded that the baby had been poisoned and refused to let his parents be with him alone. Police investigated but couldn’t prove that the parents did it. Still, Ryan was placed in foster care, and his parents were allowed see him one hour each week.
Three days after a visit Patty, Ryan was brought back to the hospital for poisoning. Patty was charged with assault and taken to jail. Baby Ryan perished on Sept. 7 that year, while Patty was charged with first-degree murder. Weeks later, she discovered she was pregnant again.
Patty and David’s second child David Jr. was placed in foster care immediately upon birth. Patty was still being held in jail, and David had little visitation with the baby. David Jr. started having the same symptoms as his brother at just two weeks old. He was diagnosed with MMA, a rare genetic disorder in which the body produces chemicals like those in anti-freeze.
Though it was argued in court that the second child had MMA, the judge refused to allow testimony that showed Ryan had it as well. Patty was sentenced to life in prison in 1991, and David could only see his son once a week.
After the broadcast, doctors called into the show saying that they understood MMA very well. Dr. Piero Rinaldo of Yale University confirmed that Ryan’s death was due to MMA, not poisoning. All charges were dropped against Patty, and David Jr. was finally released to his parents.
Martha Moxley

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Martha Moxley was discovered bludgeoned to death with a golf club in her backyard on Halloween in 1975. She was just 15 years old. The club belonged to the Skakel family across the street. The 15- and 17-year-old Skakel boys were suspected to have something to do with the murder as they had no alibis.
Even though the Skakel boys were the top suspects for decades, there wasn’t enough evidence to charge them.
After the episode on the incident aired, tips poured in from viewers who knew the younger Skakel brother Michael. He was sent to a school for troubled teens four years after Martha’s death where he bragged about the murder. Michael was charged with her murder 27 years after it had taken place. He was sentenced to 20 years to life behind bars.
His motive may have been that he was jealous that his older brother was having a sexual relationship with her.
Kevin Poulsen

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Kevin Poulsen was a techie who found a way to hack into a Pentagon-funded computer network when he was just 16. His illegal activities were found out, and his computer was confiscated in 1983.
Five years later, when Kevin was 21, he was found to be stealing electronic equipment that contained sensitive government information and wire-tapping equipment. The FBI found that he was hacking into the U.S. government’s computers to retrieve classified documents. He was charged with several crimes including conspiracy, but he disappeared before he could be sentenced.
After Unsolved Mysteries aired his story, the FBI received tips that Kevin was in L.A. He was tracked down and arrested at Hughes Market. Eventually, he was sentenced to 51 months in prison.
After his release, he helped write a computer script that outed nearly 1,000 sexual offenders using Myspace to prey on children.