Harbor Island, Grand Haven - photo from Jon Mills
Jessica Heering was last seen at the Exxon Mobil gas station on April 26.
NORTON SHORES, Mich. (WZZM) -- Day 11 in the search for Jessica Heeringa lead investigators to the north side of Grand Haven.
Michigan State Police searched Harbor Island and the the Grand Haven Power Plant for three hours Tuesday morning, using two K-9 units. Investigators combed the area around ponds and marshes.
Betty Mackenzie has been passing out the flyers with Jessica Heeringa's photo. She says her concern for Heeringa increases every day. "I just do not know what to think about this whole deal," said Mackenzie. "I hope and pray they find her and she is safe."
Norton Shores Police Chief Daniel Shaw says besides Harbor Island investigators also visited the John's To Go business. The company is one of several in the area that maintains a fuel account at the Exxon station where Heeringa disappeared April 26. Investigators have been visiting those companies and talking with employees.
"Routine follow up, if you will, to track down possible customers of the store to see if anyone may have witnessed anything," said Shaw.
Chief Shaw says four men: Heeringa's former boyfriend, current fiancé, and two acquaintances have all spent time with investigators. "We did run down those four people and have eliminated them from our current investigation."
The four men took polygraph tests and turned over belongings to police. "I believe all of those individuals voluntarily gave us their cell phone to freely download all of the data," said Shaw.
Even after another public search, Chief Shaw believes his team of investigators is making progress in private and will eventually find Heeringa. "We are one step closer to Jessica every day."
Click here for continuing coverage of the Jessica Heeringa disappearance: http://on.wzzm.com/ZEVLrg