two crime reporters there had been breaking stories about the danziger bridge shootings, which had attractedattention of federal investigators. four people wounded, two dead-- was it a justified shooting? >> officers say there was an exchange of gunfire on the bridge. the surviving people say that they never fired any guns or had any guns. >> narrator: publicly, the men under investigation had the full support of their fellow officers. >> a lot of police officers think that these aren't fair investigations. if they did something that, in retrospect, seems inappropriate, they were just trying to deal with... with the hand they'd been dealt. >> narrator: danziger was the big story. but the times-picayune reporters had also been looking into the glover case. they had a simple question: who shot henry glover? >> there was all these different stories running around, and when i talked to henry glover's former girlfriend-- who had henry glover, jr., who is now 13-- she heard a story about another family member shooting him. i mean, these were all crazy allegations. >> i had my own theory about what

. >> reporter: is the danziger bridge going to go down as the low point imagery for the nopd? >> yeah, it will. and i would have to say that it's not katrina that caused nopd to be like it was. it just manifested the dysfunction. >> reporter: still, most of the city's residents came back after katrina. it is believed about 75% of its close to half million former residents have returned. but the struggle to rebuild has been monumental and, for some, coming home was never an option. >> lower ninth feels so much the same today, five years later, as it did a month later, a year later. the debris has mostly gone, but it is not a place where you feel a vibrant sense of return. >> reporter: every visit i make back here, i'm always stunned to see water marks still and roofs missing. that must drive you crazy. >> it does. those of us that have been here know that it is a very, very long process to rebuild a very intricate network and fabric of our lives. >> reporter: dr. irwin redlander of columbia university has been following a thousand families affected by katrina. >> we are seeing