(CBS) NORTON SHORES, Mich. - Investigators have determined that substances found outside a gas station where Jessica Heeringa, a 25-year-old Michigan mother, vanished April 26, turned out to be blood of the missing woman, The Detroit Free Press reports.
According to the paper, officials used DNA analysis to conclude the substance was Heeringa's blood.
"There was only a small amount of blood located," Norton Shores Police Chief Daniel Shaw said in a news release issued Wednesday afternoon. "The family has been notified of this information."
The young mother disappeared Friday, April 26 around 11 p.m., shortly before she was set to close the Norton Shores, Mich. gas station where she worked. The station didn't have a security camera and there were no signs of a robbery, though the case is being treated as an abduction.
Authorities have been focused on a gray- or silver-colored minivan reportedly seen at the Exxon station at the time of Heeringa's disappearance. Police released surveillance footage captured from a tavern about a mile from the gas station which showed the vehicle of interest traveling away from the scene of the alleged abduction.
Police also released a sketch of the man seen driving the minivan.
Anyone who may have witnessed suspicious activity near the Exxon Mobil gas station in Norton Shores, Mich. is asked to contact Silent Observer at 231-72-CRIME (231-722-7463) or call 911.