Julia Pierson: resigned as US secret service director  following a series of major security breaches around President Barack Obama. Photograph:  Chip Somodevilla/Getty Images

The latest revelation exposing another security breach on the US secret service’s watch – that a private contractor armed with a gun accompanied Presi(...)

Paul Singer, billionaire founder and president of Elliott Management.   Photograph: Jacob Kepler/Bloomberg

The hedge fund firm of billionaire Paul E Singer has about 300 employees, yet it has managed to force Argentina, a nation of 41 million people, into a(...)

Lawyers for businessman Sir Anthony O’Reilly have asked a US court to dismiss a lawsuit taken by his former nurse and personal assistant contesting(...)

An undated photograph of former mob boss James ‘Whitey’ Bulger, who has been found guilty of a racketeering conspiracy by a federal court jury in the US. Photograph: Reuters

James ‘Whitey’ Bulger, the Irish-American who was once the most feared mobster in Boston, was found guilty by a jury today of murder and racketeering(...)

The company logo of Halliburton oilfield services corporate offices in Houston, Texas. Halliburton, the world’s second-largest oilfield services company, is to plead guilty to destroying evidence related to the 2010 Gulf of Mexico oil spill. Photograph: Richard Carson/Reuters

Halliburton has agreed to plead guilty to destroying evidence related to the 2010 Gulf of Mexico oil spill, the US Department of Justice said.The gove(...)

Seán Dunne, who has debts of $942 million, faces the possibility of being declared bankrupt in Ireland as well as in the US.

Property developer Seán Dunne will face questions before his creditors for the first time in his US bankruptcy proceedings next week, after withdrawin(...)