but with him it was far more visible. >> reporter: eva and hans kristian rausing first met in a drug facility over 21 years ago. as she detailed in her own blog, sobriety remained a constant struggle. but it was a struggle that paralleled her philanthropy. eva rausing helped found the addition prevention charity mental uk. >> she gave a great deal of money over the years. to get the charity established and operational. >> reporter: often in these kind of situations, people say, well, they didn't really know what they were getting into, but it sounds like eva understood only too well. >> there's a difference between knowing that something's harmful and being able to do something about it. one of the other people on the board kind of said, well, our position is we hate drugs and we all think drugs are a bad thing. most people actually agreel with that. and she said no, actually, that's not really my position. if only it was as straight forward as that. my problem is i actually love drugs. >> reporter: british police are still treating her death as unexplained. there is no denying the ha

answers, ten days after she was found dead in the london mansion she shared with her husband, hans kristian rausingthe son of one of the world's richest men. london police did charge him with preventing the lawful and decent burial of his wife. her body was badly decomposed when it was discovered. mr. rausing is in rehab. cause of death has not been determined yet. among the questions tonight, how their life of enormous privilege and promise it once held, how it came to this. >> reporter: eva rausing and her billionaire husband hans kristian were fixtures on the london social scene. he is heir to the tetra pack food giant fortune. she was the trustee to one of prince charles charitable foundations. all that an ended in 2008 after she was caught attempting to smuggle crack cocaine into the american embassy in london. she was given a warning and charges were dropped. the problems with drugs didn't end there. last week, her parents flew into the uk to identify her body. nothing in eva rausing's early upbringing gave any hint of the tumult to come. born into comfort, her parents live in a million dolla

and her husband, hans kristian rausing, a suspect. on monday, hans was stopped by police on suspicious of drugs. police searched his home and found the body of his wife. how did the couple get to this? this was them in 1996. glamorous among britain's high society. he, the heir to a multibillion-dollar fortune of petra pack juice cartons. she, giving millions to charity. and this was them just weeks ago, caught on camera on a busy london street, parked illegally. clearly struggling. in their five-story mansion in london's wealthiest neighborhood, they reportedly lived in just two rooms. they lost custody of their children. in 2008, she was found caught smuggling crack and heroin into a party in london. now, another twist. reports that her husband lived with her body in that mansion for several days. >> the question begs, why in the world would you do that? unless you had something to do with her death. >> reporter: police have not been able to question hans kristian yet. he's still suffering from drug and alcohol withdrawal. her mother