. >> reporter: the new law authored by sandra swanson and signed by governor arnold schwarzenegger appoints an independent auditor. it also creates an 11 member citizen review board to recommend disciplinary action. >> this is a new page in bart's history. >> reporter: the new law is the latest change at bart is the shooting death of oscar grant the iii by mehserle about a year and a half ago. >> things that go wrong prior to this, the bart police department did it themselves. it was our own internal affairs. after january of 2009, that had to stop. >> it gives us another place to go, they look at our training, they look at our policy. they look at the investigations and they can spot check why did the officer do this? why did an officer pull a gun, why did an officer pull a taser. why didn't he use the night stick. >> reporter: the oversight is new to bart, but not to many other police departments. >> what bart is trying to do is combine the both. when you have too many hands in the pot, it may get a little interesting. >> they are going to work with us. we always agree, probably not will