Authorities say she helped Eric Floyd hide after he and two other men robbed a bank and fatally shot Sgt. Stephen Liczbinski in May 2008.
Defense lawyer Bernard Siegel says Stephens simply went with Floyd when he ran. Floyd was captured four days after the robbery and is awaiting trial.
Stephens was also sentenced in a separate probation violation case Thursday to 2-1/2 to five years in prison. The sentences will run consecutively, for a total of 6-1/2 to 13 years.