i spoke to the owner recently, basically his friends parents owned a video store and MJ's bodyguards asked them if they could close the store so MJ could browse.
they did and he signed the picture while they were there. i asked how they got the picture and he said the bodyguards carry them around with them.
the parents lived in monaco at the time and sent it over to the son who lived in the uk.
this was in 1996 when MJ was in town for the world music awards.