In June, police said Bob worked to hire a hit man to kill Gentz in jail.
Bob pleaded guilty to solicitation of murder in October.
The 54-year-old said he "foolishly and regrettably" had offered to pay a man to find someone to kill Gentz.
Bashara was sentenced in December to a minimum of 80 months in prison and a maximum of 20 years.
He is jailed in Manistee.
Bob will likely face new charges
Investigators have not stopped working the case.
The Defenders have learned that charges may be brought against Bob in connection with his wife’s death.
Statement from Jane Bashara’s sister, Julie Rowe:
"We have spent the last year grieving as privately as possible, and we appreciate the respect that has been shown to us. We miss Jane. We look forward to a satisfactory conclusion to the investigation into her murder."
SPECIAL COVERAGE: Jane Bashara Murder Investigation