Marc Dutroux

Dutroux's accomplices included his wife, Michelle Martin; Michel Lelièvre; Michel Nihoul; and Bernard Weinstein. Martin was convicted and sentenced to thirty years in prison, while Lelièvre was sentenced to twenty-five years. Nihoul, "a Brussels businessman, pub-owner and familiar face at sex parties," was initially tried as an accomplice to the kidnappings but was acquitted owing to insufficient evidence; he was instead convicted of involvement in a gang that participated in human and drug trafficking, and was sentenced to five years in prison. Weinstein was never tried as he was murdered by Dutroux before being identified as an accomplice.
The lenient result of Dutroux's first prosecution, as well as shortcomings on the part of the police in investigating his murders, caused widespread discontent in Belgium with the country's criminal justice system, resulting in the complete reorganisation of Belgium's law enforcement agencies. In the White March held on 20 October 1996, 300,000 Belgian citizens protested the mishandling of the case. Provided by Wikipedia