Nicola Bulley cops have been urged to search a river inlet where a teenager vanished 45 years ago.
A river expert living locally to the Wyre waterway, where police and diving experts have been searching for two weeks, says there are areas which cannot be accessed by boat and can only be reached by foot.
The man, from St Michaels on Wyre, said one of the inlets is the exact same spot where missing 16-year-old Roger Jones was found two months after vanishing.
Roger had entered the water after being thrown from from his motorbike in a crash on January 27, 1978 - exactly 45 years to the day when Nicola vanished.
The river expert, who has not been named, said some parts of the river where a body could wash up can only be accessed by foot.
He said: "There are a few places where you'd most likely get lodged for a night or two where there are inlets and gullies, some of which are quite long.
"You can't take a boat down them. I just don't understand why we're not searching this area.
"History says that by now she would be much further down the river", as reported by The Sun.
Police looking for missing mum Nicola Bulley have extended the search to the sea after an expert dive squad couldn't find her in the River Wyre.
It comes as the top investigator said detectives had ruled out any foul play.
The 45-year-old vanished on a dog walk in St Michaels on Wyre on January 27, with her phone found on a bench overlooking the water.
A major search effort has been launched, which includes drafting in independent underwater forensic experts Specialist Group International this week.
One of Ms Bulley's friend's, Heather Gibbons, said "nothing is making sense" in the case as she said speculation on social media is hurtful to the family.
Firm chief Peter Faulding previously told the Mirror his team's sonar could find Nicola in under an hour if she is in the river - however, he expressed doubts she ever fell in.
He added that he considered it almost impossible that she would have been dragged down to the estuary, hypothesising that a body would become "snagged" within 500 metres of the entry point.
