The Deepwater Horizon supervisor who pleaded guilty to a pollution charge in connection with the 2010 Gulf of Mexico oil spill says the colleague now fighting that charge never gave him information that prosecutors say was critical. Testimony is to continue in the trial of a supervisor accused of ignoring danger signs hours before the Deepwater Horizon rig exploded in April 2010, eventually spewing more than 100 million gallons of oil into the Gulf of Mexico. Robert Kaluza was day supervisor on the rig for energy giant BP PLC.