Deputies said store security approached Stump. They said he folded the knife but kept it in his hand. Investigators said a struggle broke out between Stump and store security, but ended in the parking lot.
Authorities said as Stump was brought back into the store, he allegedly exposed himself to employees and made threats that he would get even with employees.
According to deputies, a small amount of marijuana was found on Stump as he was taken to jail.
Stump was charged with aggravated robbery, two counts of intimidation, public indecency and drug abuse.