Chikatilo's dubious background was uncovered but provided insufficient evidence to convict him of the murders.

How a girl, gently reared, could become infatuated with this rover, unprincipled and of dubious background, is something I cannot understand.

Robert Barnard: "Elderly man married to a glamorous nitwit of dubious social background is a common plot-element in Christie.

Any other woman of Mary's dubious background would have greatly cherished this unexpected promotion to the better classes.

Marge Piercy (1969) argued that liberal male politicians will sometimes espouse feminist claims to gain votes, despite dubious backgrounds and actions.

Hidden inside WS & C is a well-organized industrial espionage section - run by an unpleasant character with a dubious background.

He is a man of dubious background and dubious ideas.

Gilbert Kemp is dealer specializing in antique guns in London with a somewhat dubious background.

Was America justified in recruiting scientists with dubious, or worse, backgrounds to assist us in weapons design and the space race?

Also, several dozen people with criminal or dubious backgrounds were paid by the United States while they were employed by West Germany's secret service.