A key figure in the 1995 bombing of a federal building in Oklahoma City will be released this Friday, after serving close to 11 years in prison.

Michael Fortier was sentenced to 12 years on charges that included knowing in advance, but not informing authorities, about the 1995 Oklahoma City bombing that killed 168 people. 

Fortier was the prosecution's star witness.  He agreed to a plea bargain, which called for him to testify against bombing conspirators Timothy McVeigh, who was executed in 2001, and Terry Nichols, who is serving a life sentence.

Fortier's sentence was shortened due to good behavior, and time served before his sentence.

Several family members of victims of the bombings said Fortier has served enough time, and should be released.

Some information for this report provided by Reuters and AP.