<Tr> <Th> Criminal status </Th> <Td> Convicted; Incarcerated at ADX Florence supermax prison Federal Correctional Complex, Florence Fremont County, Colorado </Td> </Tr> <Tr> <Th> Parent (s) </Th> <Td> Virginia Conway, Thomas Conway </Td> </Tr> <P> Thomas Edward Silverstein (born February 4, 1952) is an American convicted murderer . He has been incarcerated continuously since 1977 and has been convicted of four separate murders while imprisoned, one of which was overturned . He has been in solitary confinement since 1983, when he killed prison guard Merle Clutts at the Marion Penitentiary in Illinois . Prison authorities describe him as a brutal killer and a former leader of the Aryan Brotherhood prison gang . Silverstein maintains that the dehumanizing conditions inside the prison system contributed to the three murders he committed . He was held "in a specially designed cell" in what is called "Range 13" at ADX Florence federal penitentiary in Colorado . He is currently the longest - held prisoner in solitary confinement within the Bureau of Prisons . </P> <P> Thomas Silverstein was born in Long Beach, California, to Virginia Conway . Conway had divorced her first husband in 1952 while pregnant with Silverstein and married Thomas Conway, who Silverstein claims is his biological father . Four years later, Virginia divorced Conway and married Sid Silverstein, who legally adopted her son . </P>

Who has spent the most time in solitary confinement