The thing is, Steven wouldn't just go off with a stranger. Why would he? He wasn't a child, nor mentally disabled no autistic. He wouldn't have just gone off and left his Mum at the toilets wondering where he was. I just don't think he would. The witness who said he/she saw Steven with with a balding man in his 50s, This would fit his Dad's description as he was back then. The ITV documentary does seem to hint at that too. MOO.