Blankenship said a man walked into the store and acted as if he was going to purchase a 40-ounce container of beer.
When he was at the cash register, he pulled out a knife and demanded money. The clerk handed the robber all the cash in two cash registers, including food stamps.
After the robbery, El Centro police Officer Ray Bonillas pulled over a van for a minor traffic violation on Dogwood north of Interstate 8.
The passenger in the van, Hernandez, had an arrest warrant and was arrested. While police were searching the van they found items apparently taken from the store, including the 40-ounce container of beer, and a knife.
The driver, whose name was not available, was not arrested. Further information on Hernandez's arrest warrant was not available.
Blankenship added Hernandez was identified by the clerk as the robber and Hernandez matched images of the robber taken by a surveillance camera in the store.
Blankenship said the incident is still under investigation and police will file a complaint against Hernandez with the Imperial County District Attorney's Office.
>> Staff Writer Mario Rentería can be reached at 337-3441.