What woman in their own mind would marry the mass murderer Charles Manson? Convicted serial murderer Charles Manson was granted a marriage license. What prompts a 26-year-old woman to marry a killer incarcerated? So many questions to answer. Serial killer Charles Manson is to marry his 25-year-old girlfriend behind bars, she has claimed. In an interview with Rolling Stone magazine. Afton “Star” Burton, the 26-year-old girlfriend of Charles Manson has reportedly procured a marriage license to wed the 80-year-old. Mass murderer Charles Manson plans to marry a 26-year-old woman who left her Midwestern home and spent the past nine years trying to find him. Charles Manson, perhaps the most infamous convicted killer of all time, is 80 years old and still locked up in California's Corcoran State Prison. Now that he is 80 years old, Charles Manson's hippie exterior has weathered. Charles Manson has been in prison since 1969 and isn't eligible for parole until 2027.