Sara Jane Olson, a former member of the Symbionese Liberation Army, was freed from jail Thursday after serving around six years behind bars for attempting to bomb several police cars.

She was sentenced to 12 years in prison in 1999, but managed to earn credit against her sentence by working while in prison. She was a member of a maintenance crew that cleaned the main yard of the Central California Women's Facility in Chowchilla, prison officials declared.

Olson was one of the most wanted fugitives for 25 years after she disappeared in 1975, the year when two police cars were bombed. She changed her name from Kathleen Soliah to Sara Jane Olson, married a Minnesota physician and lived as a housewife until she was discovered in 1999, charged of planting bombs in police cars.

Olson also served time in jail for second-degree murder, following a bank robbery initiated by the SLA, in which customer Myrna Opsahl was shot to death.

The former SLA member, aged 61, pleaded guilty to both accusations, first in 2001, to the bombing attempts, and then in 2003, to murder.

The Los Angeles Police Protective League was very disappointed by Olson’s release from prison.

“She needs to serve her full time in prison for these crimes and does not deserve time off for working in prison. Criminals who attempt to murder police officers should not be able to escape justice simply because they have good lawyers,” said Tim Sands, president of the league.

The Los Angeles Times informs that, according to Terry Thornton, a spokeswoman for the California Department of Corrections and Rehabilitation, Olson had no discipline problems while in prison.