A case against a mother and son charged in a robbery and attack at a Minot storage unit has ended with a mistrial.

Forty-six-year-old Vaneica Erickson and her 27-year-old son, Scott Parizek, are accused of robbing the storage unit last September, physically assaulting a 22-year-old woman and interfering when the victim and her 95-year-old grandmother tried to call 911.

The Minot Daily News says Erickson and Parizek have proclaimed their innocence and planned to argue their actions were in self-defense or in the defense of others.

It was not immediately clear if the case will be retried.