>> reporter: again i want to reiterate there are 1500 people still unaccounted for in joplin. they may have left town. they may be staying with friends. or they could be buried beneath that debris. city officials don't know. and they are trying to track people down. >> greta: of course, kris we tell them to take shelter where to take shelter in joplin when you look and see they have no shelter. hopefully they've gone to schools or some place. kris, thank you. >> reporter: you bet. >> greta: turning the corner. do you remember the case lee anthony murder investigation? her mother is charged with her murder. today a bomb shell was dropped in the courtroom. were casey's parents part of a cover-up? was casey sexually abused by her father george and her brother lee. the defense attorney told the jury that and didn't stop there. he claims 2-year-old caylee accidentally drowned in the family's backyard pool.