A screenshot of the post from the Imigration Officer is still on the sisters fb, THAT is the person who told her he made the Helsinki flight # AY142...she asked if it was DEFINITE and they replied to her by saying they are an Immigration Officer from Thailand so THAT defines the accuracy of the info eta 2BBM: YES they said that!!!!!
This does not sound as though the responsible investigating officer(s) in Thailand have made any confirmation at all.
This sounds like the kind of garbage that was going on with Jay Slater in Tenerife when the worst of social media got involved.
Perhaps his phone was stolen from him and that person ended up with his phone on a plane to Helsinki. It's not making sense to me at all yet.