Answer
Allenwood, Pennsylvania, served as the location where Shkreli spent his prison sentence. This facility, situated in Union County, houses male inmates convicted of various federal offenses. Allenwood is part of a federal prison complex that encompasses several facilities, including a low-security camp, a medium-security prison, and a high-security prison. During his incarceration, Shkreli was assigned to the low-security camp within the Allenwood complex.