The article noted that Hopkins reported that he had received a letter from security agents - signed only Richard and Dan - who claimed to have seen a figure floating in the night sky.
In the note, they reportedly said 'we can't live with ourselves' for not sharing what they saw.
Richard and Dan said they saw three 'strange figures' and a 'young woman in a white gown' floating through an apartment window and then transported to a UFO.
As per HiggyPop, a website dedicated to stories of paranormal activity, there have been suggests that political figure the bodyguards were protecting may have been Javier Perez de Cuéllar, the Secretary-General of the United Nations at the time.
However, he has never confirmed his involvement.
It would be a blockbuster case if the above was true but it's not even possible to verify that the two agents actually exist.
Anyway, it'll be interesting to see what ground they cover as the case gets pretty weird and convoluted which might be edited out.