As part of a series of interviews for Help Me Investigate, the Bureau of Investigative Journalism's Iain Overton gives his tips on challenging official versions of events and statistics

As part of a series of interviews for Help Me Investigate, the Bureau of Investigative Journalism's Iain Overton gives his tips on finding information through online and offline sources

As part of a series of interviews for Help Me Investigate, the Bureau of Investigative Journalism's Iain Overton gives his tips on some of the personal qualities to develop as an investigator