A former fishing boat captain is facing up to six years in prison for deliberately dumping oily slops into the Pacific Ocean.
A jury in Seattle convicted Randall Fox on Thursday for violating the federal Act to Prevent Pollution from Ships.
He also faces a $250,000 fine when he is sentenced.
A crewmember on his boat videotaped Fox dumping waste and turned the tape over to prosecutors.
The Justice Department says Fox's father was also convicted of a pollution- related crime last year.