Police said he remained under arrest Wednesday but was receiving medical attention at a location away from a police station. They would not say if the man was under guard.

Eva Rausing's parents, Tom and Nancy Kemeny, and the rest of her family paid tribute to a "devoted wife" and mother of four "much loved and wonderful children," saying they were devastated over her death. Their statement also alluded to her struggles.

"During her short lifetime she made a huge philanthropic impact, supporting a large number of charitable causes, not only financially, but using her own personal experiences," the family said in a statement. "She bravely fought her health issues for many years."

A statement from her in-laws, Hans and Marit Rausing, said they were "deeply shocked and saddened to hear of the tragic death."

Eva Rausing supported a number of charities that helped to fight addictions. One of them — Action on Addiction — was among the first to express sadness over her death and praise her "wonderfully generous" support over the years.

She also was listed as a long-time supporter of The Prince's Foundation, part of a group of nonprofit charities that have Prince Charles as their patron. His office said the prince was told of Rausing's death but did not offer further comment.

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