joining us now is rosa brooks, law professor at georgetown university law center and former washingtontangled up in blue: policing the american city." also with us, mark claxton, a director of the black law enforcement alliance. professor brooks, or officer brooks, i don't know which to use. >> you can call me rosa. >> so your husband thought you were insane, that's the word he actually used when you said as a law professor i think i'm going to join this reserve troop of the metropolitan police department. this is the big city police department of washington, d.c., not to be confused with the capitol police, this is the police force that patrols that big city. why did you decide to do it? >> you know, i think if you want to change something, you need to understand it first. we live in a culture that likes these polar oppositions. you meet people, ask them about police and they're going to tell you they're underappreciated heroes who can do no wrong or they're a bunch of brutal racist thugs and they can do no right. i thought whenever you get that kind of polar opposite, the truth is a