Michael Fortier, the star witness in the Oklahoma City bombing trials, was released Friday from federal custody, his attorney said.

Fortier, 37, has served about 85 percent of a 12-year sentence in federal prison. He received a plea deal in which he agreed to testify in the trials of bombing coconspirators Timothy McVeigh and Terry Nichols.

His attorney, Michael McGuire, said Friday afternoon that he could not say the exact time or location of Fortier's release.