"We personally believe that the CEO was aware of those circumstances and could have intervened and chose not to," Coon said of one of Britain's best-known business leaders.
A total of 15 people died and hundreds of workers were injured in the March 2005 explosion at the BP refinery.
Jury selection for the trial is due to start Monday.
The lawyer said, however, that US energy behemoth ExxonMobil and a group of energy associations had filed a motion with the Texas Supreme Court seeking to stop his questioning of Browne at the "eleventh hour."
Coon has led other cases against BP on the behalf of injured workers and relatives of those killed in the blast.




