the bridge you heard, quote, the captain screaming at andrea for pushing the distress button, end quote, was that a truthful statement? >> i object to that. same objection captain. we've gone through this ten times today. instruct the witness not to answer anything specifically a question on this statement. >> i object to the relevance of the question. it has no relevance to what we're here for. >> the relevance is it reflects a complete loss of command and control onboard the bridge at a time when they're trying to decide, they've had two explosions and there is an argument whether they're in a distress situation or whether to activate the eds. that is the relevance. >> i agree. proceed. >> reporter: when workers did activate the ebs system it did not work. bertone also testified the rig's thruster was having problems eight months before the accident. as the coast guard and the unit of the department of interior tried to pinpoint who is at fault, one former prosecutor says, criminal charges are likely at some point. >> people were making decisions to continue on, to keep drilling