A man suspected of participating in the murder of a woman in Marion earlier this year has accepted a plea deal. As a result, 25-year-old Bo Cook has been sentenced to 20 years for his role in the shooting death of Amy Aldrich in February. Cook pled guilty to charges of voluntary manslaughter, having a weapon under disability and tampering with evidence. The victim was a 30-year-old mother of three children, including a young daughter she shared with Cook. The woman had moved out of Marion but was back in town to attend a hearing regarding the custody of that daughter when she was murdered. The plea deal means Cook will avoid a trial on charges of complicity to premeditated murder, a trial that had been scheduled to start next month. Cook was one of two suspects initially identified by authorities. The other suspect, Raymond Bertuzzi, still faces a trial, set to begin Nov. 5th. Prosecutors allege that Bertuzzi is the one who actually shot the victim to death.