the investigation into the deadly ferry disaster in south korea is widening. three members of the south korean shipping association have been arrested suspected of destroying evidence connected to that sinking ferry. also this morning, the coast guard released new video of the ship sinking and passengers being rescued. just as prosecutors start to investigate whether the agency failed to adequately do its job. nic robertson has more on the widening investigation. >> reporter: prosecutors here say they have arrested another three people. they worked for the korean shipping association, an association that takes care of the interest of korean shippers. they accuse these three people are destroying documents relating to the company that