That Friday, the station was scheduled to close at 11:30.
At 10:55, Heeringa made a transaction.
Twenty minutes later, a customer called 911 to report that no clerk was in the store. Police reported nothing had been stolen, ruling out a robbery.
The fact that there are no surveillance cameras in the store is hampering the investigation.
Heeringa is five feet one inch tall, and weighs approximately 110 pounds. She has blond hair and blue eyes. She sometimes wears wire-rim glasses. At the time of her disappearance, she may have been wearing a blue-collared shirt with a “Sternberg Exxon” logo on it.
Police wish to speak to a white male seen driving a silver mini-van, possibly a Chrysler Town & Country, near the store in the time-frame in which Heeringa disappeared.
Anyone who may have witnessed suspicious activity near the Exxon Mobil gas station is asked to contact Silent Observer at 231-722-7463.