He was murdered in Amsterdam, one day before he was to talk to various media about the various investigations the Dutch Department of Justice was conducting after him.
His murder was one of several in a string of underworld killings during late October and early November 2005 and one in a longer series of assassinations that started in 2000.
Both he and Hingst were suspected of involvement in the extortion and subsequent murder of real estate magnate Willem Endstra.
Born in Utrecht, Hingst was imprisoned for several weeks when, during a raid of his office in 2005, the police discovered three firearms and a large sum of cash.
A suspect of money laundering, membership of a criminal organization and possession of firearms, Hingst gave up his profession as a lawyer in July 2005.