A fire protection officer was questioned over the disappearance of Madeleine McCann after being spotted in a petrol station with his step-daughter, who looks like the missing girl.
Jon Hazlehurst and eight-year-old Lauren were at home when officers arrived at their doorstep and asked them to go to a police station.
A member of the public had seen the pair at a petrol station the day before and thought blonde Lauren was missing Maddie.
The concerned witness had noted down Mr Hazelhurst's car registration plate and immediately notified police.
Officers then visited the family home and Jon and Lauren were taken to a police station for an identification process.
Mr Hazelhurst, of Kingsbridge, Devon, said he thought it was a ''prank''.
He said: ''I was surprised more than anything. My first thought was that it was someone pulling a prank on me before I realised that they were quite serious.
''I've never been called into a police station as a possible kidnapper. The police were very polite and I understood that they had to follow up the lead, even if it didn't come to anything.
''There's always a chance a tip-off like that might lead them to Madeleine.''
Mr Hazelhurst and Lauren pulled in for petrol on their way back from walking their dog at nearby Slapton beach on Sunday.
The following morning officers knocked on Mr Hazlehurst's door asking him and his step-daughter to come to Kingsbridge police station.
The pair went with the officers but were later released after they were identified and it was proved that she was not Maddie.
Sgt Paul O'Neill, of Kingsbridge Police, said Lauren did bear a resemblance to Madeleine McCann - except for a different eye colour.
He added: ''I thank the lady for bringing it to our attention. She did well to spot the little girl and inform us. Fortunately, the parent was more than willing to help.''
Madeleine McCann disappeared in May 2007 while on holiday with her parents and twin siblings in the Algarve region of Portugal.
She went missing a few days before her fourth birthday and would be six years old now.
in The Telegraph