1.   Because this murky history was never properly confronted or acknowledged during the Communist period, he suggests, such hatreds could only intensify and fester.

2.   JFK had a murky history of venereal disease dating to his teen years.

3.   Curators and museums are concerned that such disputes over paintings with murky histories will discourage the international flow of artwork.

4.   Such disputes over paintings with murky histories concern curators and museums, who fear that the international flow of artwork will dry up.

5.   The Irish snake trade has its own murky history.