The first half is strikingly close to what happened recently in the UK - John Darwin went missing while canoeing in the North Sea during 2002. His canoe was found, but his body was never recovered and he was declared dead in 2003.
In 2007 he returned to life, having lived in the intermediate years as John Jones, firstly in the UK (living in a bedsit next door to his old home, then living with his supposed widow wife, before they moved overseas, eventually ending up in Panama. The catalyst for his return was a change in Panamanian visa law, which required British police confirmation of his identity.
So he came back to the UK, claimed he had amnesia and didn't know what had happened after his disappearance, and his widow wife and children played their part in the fantastic return - but it soon all unravelled when it was discovered that his wife knew all along and had lived with him in Panama for several years.
They are both now serving jail sentences for insurance fraud.