Here are the police reports detailing the confrontation last week between Harvard professor Henry Louis Gates, Jr. and Cambridge police who were condemned last night by President Barack Obama for acting "stupidly" in arresting the African-American "scholar". Of the three protagonists here, Pres. Obama, Prof. Gates, and Ofc. Crowley,
only one (the last) wasn't "acting "stupidly", in my view.
Police responded to Gates's house after neighbor reported spotting "two black males with backpacks" trying to gain entry to the home. Gates, returning home from a trip overseas, and his driver were contending with a stuck front door. Cambridge Police reports quote an incensed Gates yelling, "This is what happens to black men in America!," and, when asked by Ofc. Crowley to speak with him outside the residence, Gates replied, "ya, I'll speak with your mama outside." A disorderly conduct rap was filed against Gates.
I have figured out at least part of this misunderstanding. Perhaps Prof. Gates was hoping to introduce Ofc. Crowley to the famed cellist; and was simply misunderstood "I'll speak with yo' mama outside", or he misspoke his intended "I'll speak with Yo-Yo Ma outside"

By the way, Rich Lowry ponders the famous snapshot of the arrest, "there's a black cop prominently in the foreground. Doesn't that vitiate somewhat the idea that this was a flatly racist arrest?"