Friends of Nicola Bulley on Friday made a plea for “crucial” dashcam footage from the area the mother-of-two disappeared from two weeks ago.
Emma White said Ms Bulley’s loved ones are seeking to “jog” people’s memory about the day she went missing while walking her dog in Lancashire on January 27.
Groups gathered for a roadside appeal in St Michael’s on Wyre in a bid to uncover clues that could lead to the 45-year-old being found.
Ms White told BBC Radio 4’s Today programme the mystery surrounding what happened to her friend is “frustrating” and the search “like torture”.
She said: “It is two weeks today. The local community are coming out to raise that profile. We’re trying to jog anybody’s memory.
“We just need Nikki home for her two beautiful little girls who need their mummy.”
Ms White added that residents in the area have received a letter asking for information, and she made a particular plea for witnesses and dashcam footage from Garstang Road, just outside the village, around the time Ms Bulley went missing.
“Anybody that was in the area will have a letter again to see if they’ve got any dashcam footage to send in,” she said.
“Ultimately we have an area out of the river when Nikki actually went in that we have no footage for so we don’t know if she’s wandered out or anybody’s seen her. So this is really crucial.”
Lancashire Police believe Ms Bulley fell in the River Wyre while walking her springer spaniel Willow.
The force has shifted its search away from the stretch of river bank she vanished near, to further downstream, towards where the River Wyre meets the Irish Sea at Morecambe Bay.
Officers have also been seen sweeping the water at Knott End-on-Sea, around 10 miles from where the mortgage adviser’s phone was found on a bench, still connected to a work call.
Ms Bulley’s family called in help from Peter Faulding, a rescue and forensic search specialist, but after a three-day search earlier this week, no trace was found.
Police have dismissed suggestions that Ms Bulley was a victim of crime and say the scale of the missing person inquiry is “unprecedented”, involving 40 detectives and following 500 lines of inquiry.
However, it has not stopped amateur social media sleuths from descending on the area to start their own investigations.
Police issued a dispersal order this week following reports of that people were trespassing on properties of residents they deemed “suspicious” to film TikTok videos.
A Lancashire Police spokesman also said the force was “aware of a number of grossly offensive comments being made on social media and elsewhere” relating to Ms Bulley’s friends and family.
The said police would “not hesitate to take action” and trespassing and criminal damage “would not be tolerated”.
Ms White warned the social media influencers filming in the area could become a drain on the police’s “time and valuable resources”.
“Certainly don’t take the law into your own hands”, she added.