LOS ANGELES (CBSLA.com) — Closing arguments began Monday in the federal corruption trial of former Los Angeles County Sheriff Lee Baca.

During the trial, prosecutors argued Baca was the driving force behind a conspiracy to obstruct an investigation into abuses in his jail system.

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The 74-year-old’s attorneys argued his top aide, Paul Tanaka, and other underlings were to blame for the obstruction.

The six-man, six-woman jury could begin deliberating early this afternoon or Tuesday morning.

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The former sheriff is being tried in downtown Los Angeles on conspiracy and obstruction of justice charges, which focus on a period of time five years ago at the Men’s Central Jail.

Baca retired suddenly in 2014 at the height of the federal probe. He had been sheriff since December 1998.

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