Former Boston crime boss James "Whitey" Bulger convicted in August of killing a Tulsa businessman and 10 others is in a federal prison in Oklahoma.
The federal Bureau of Prisons website says the 84-year-old Bulger is being held at the federal transfer facility in Oklahoma City.
Last week, the Boston Globe reported Bulger was ordered to pay $19.5 million to the families of his victims, with $6 million going to the family of Roger Wheeler.
Wheeler was found shot to death at the Southern Hills Country Club in 1981. His daughter, Pamela Wheeler, testified during Bulger's trial. In August, a federal jury in Boston found Bulger guilty and a judge sentenced him to two life terms in November.
It was not immediately clear when Bulger was moved or why he was moved from a New York prison to Oklahoma.
Prosecutors in Tulsa have not said whether they will move forward with a murder case against Bulger in Wheeler's death.
The Associated Press contributed to this report.