Jonathan Sprague

BP's head of drilling engineering for the Gulf of Mexico at the time of the Deepwater Horizon disaster testified he didn't believe deepwater drilling was a "high-risk" activity before the 2010 blowout of the company's Macondo well.

Jonathan Sprague's March 2011 testimony is contained in a batch of documents plaintiffs' lawyers submitted Thursday to the federal judge presiding over a trial for litigation spawned by the massive Gulf oil spill.