The Guardian reports that Sean Hoare, the former News of the World reporter who first claimed that Andy Coulson knew of phone hacking by his staff, has been found dead at his home. The police told the Guardian that they do not know how Hoare died, but do not believe the cause of death to be suspicious.
Hoare gave an interview to the New York Times in 2010 that bolstered allegations the phone hacking was a widespread and accepted practice at the tabloid. He also said that Coulson encouraged the practice. Hoare was let go from the News of the World for problems related to drinking and drugs.
Hoare had been in contact with the Guardian and the New York Times only last week, stating that the News of the World staff used police technology to track phones.
Here is the 2010 BBC interview with Hoare speaking about the phone hacking.